Download Motorola AT Commands G24-L Technical information

Technical Information
Motorola G24-L and G24-LC Developer’s Guide
Module Hardware Description
NOVEMBER 15, 2008
6802984C05-D
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Notice
While reasonable efforts have been made to assure the accuracy of this document, Motorola, Inc. assumes no liability resulting
from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this
document has been carefully checked and is believed to be entirely reliable. However, no responsibility is assumed for
inaccuracies or omissions. Motorola, Inc. reserves the right to make changes to any products described herein and reserves the
right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of
revisions or changes. Motorola, Inc. does not assume any liability arising out of the application or use of any product, software, or
circuit described herein; neither does it convey license under its patent rights or the rights of others.
It is possible that this publication may contain references to, or information about Motorola products (machines and programs),
programming, or services that are not announced in your country. Such references or information must not be construed to mean
that Motorola intends to announce such Motorola products, programming, or services in your country.
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Motorola material, such as computer programs stored in semiconductor memories or other media. Laws in the United States and
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Motorola and other 3rd Party supplied computer programs stored in semiconductor memories or other media. Laws in the United
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Accordingly, any copyrighted Motorola or other 3rd Party supplied SW computer programs contained in the Motorola products
described in this instruction manual may not be copied (reverse engineered) or reproduced in any manner without the express
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to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of
Motorola or other 3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that arises by operation
of law in the sale of a product.
VENDOR COPYRIGHT
Apache Software Foundation Copyright 2004-2005 All Rights Reserved
Usage and Disclosure Restrictions
License Agreements
The software described in this document is the property of Motorola, Inc. and its licensors. It is furnished by express license
agreement only and may be used only in accordance with the terms of such an agreement.
Copyrighted Materials
Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by law. No part of the software
or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, without prior written permission of Motorola, Inc.
High Risk Materials
Components, units, or third-party products used in the product described herein are NOT fault-tolerant and are NOT designed,
manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe
controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life
Support, or Weapons Systems (High Risk Activities"). Motorola and its supplier(s) specifically disclaim any expressed or implied
warranty of fitness for such High Risk Activities.
Trademarks
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are
the property of their respective owners.
© Copyright 2007 Motorola, Inc.
REV052604
Table of Contents
Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Target Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Regulatory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Safety Statement and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Antenna and Transmission Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Contact Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Text Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Field Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
General Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
Caring for the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi
Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Warranty Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
How to Get Warranty Service? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
Claiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix
Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix
What is Not Covered by the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
Installed Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
Out of Warranty Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxi
Chapter 1:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Regulatory Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
European Union Directives Conformance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CFR 47 Part 15.19 specifies label requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CFR 47 Part 15.21 Information to user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CFR 47 Part 15.105 Information to the user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 2:
Hardware Interface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Architecture Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Digital Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Analog Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
GSM Transceiver Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Supply Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power On/Off Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Turning the G24-L On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Turning the G24-L On Using ON_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Turning the G24-L On Using IGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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Turning the G24-L Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turning the G24-L Off Using ON_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turning the G24-L Off Using IGN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turning the G24-L Off Using AT+MRST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power Loss shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Low Power Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Activating Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Serial Interface During Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Terminating Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Temporary Termination of Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Permanent termination of Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Real Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
USB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SIM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SIM Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
SIM Design Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Handset Microphone Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Headset Microphone Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Speaker Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Headset Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Alert Loudspeaker Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Digital Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Basic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Advanced Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Audio Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Audio Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Audio Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Analog Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
A/D Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
General Purpose A/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Power Supply A/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Battery Temperature A/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Controls and Indicators Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
VREF Reference Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Wakeup Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Antenna Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
GPRS Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Transmission Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
General Purpose I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Antenna Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Battery Charger Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Battery Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Charger Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
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Battery Charging Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Under Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Pre-Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Charging (Continuos Current) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Monitoring (Full) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Protection and Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Chapter 3:
Electrical and Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Application Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Chapter 4:
Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Board Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Interface Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Mating Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
RF Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Mating Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
G24-L Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Chapter 5:
Service and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Who to Contact? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Required Query Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Motorola Workflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Testing a Standalone Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Acronyms and Abbreviations
Index
November 15, 2008
G24-L Module Hardware Description
iii
List of Figures
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2-14
2-15
2-16
2-17
2-18
2-19
2-20
2-21
2-22
2-23
2-24
2-25
2-26
2-27
G24-L Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Transmission Power Drops. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ON_N Power On Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
IGN Power On Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ON_N Power Off Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
IGN Power Off Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ATS24 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CTS Signal During Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
WKUPI_N Signal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Serial Interface Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
UART Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
USB Interface Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
G24-L SIM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Audio Interface Topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Handset Microphone Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Headset Microphone Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Differential Speaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Single-ended Speaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Differential Loudspeaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SIngle-ended Loudspeaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Voiceband Mode PCM Bus Coding Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Audio Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
VREF Power-up Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
WKUPO_N Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
TXEN_N Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Battery and Charger Interface Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Battery Charging Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4-1
4-2
4-3
4-4
4-5
4-6
G24-L Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G24-L Interface Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mating Connector Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MMCX Connector Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional MMCX Cable Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G24-L Mounting Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
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G24-L Module Hardware Description
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62
63
64
65
66
v
List of Tables
1-1
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2-14
2-15
2-16
2-17
2-18
2-19
2-20
2-21
2-22
2-23
2-24
2-25
3-1
3-2
3-3
G24-L Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Supply Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recommended Power Supply Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
G24-L Current Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SIM Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Handset Microphone Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Headset Microphone Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Speaker Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Alert Port Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Basic Mode Audio Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Advanced Mode Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Speech Processing Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Gain Control Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Speaker Port Gains for Speech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Microphone and Headset Microphone Port Gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
A/D Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
GPAD Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Supply A/D Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Temperature A/D Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Controls and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
VREF Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Antenna Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Battery and Charger Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Charger Supply Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Recommended Accessories for G24-LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Environmental Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4-1
4-2
4-3
G24-L interface connector options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Interface Connector Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
RF Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
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G24-L Module Hardware Description
vii
Preface
Note: All references to G24-L also apply to G24-LC, except where otherwise
noted.
Manual Scope
This manual provides the electrical, mechanical and environmental requirements for properly
integrating the G24-L module in a host application.
This manual gives a complete set of hardware features and functions that may be provided by
G24-L. The availability of any feature or function, which is described in this manual, depends on
the hardware revision and software version of a specific G24-L model, and also the capabilities of
the host application which must provide a user interface and control the module via AT
commands.
The parameters and values provided in this manual are defined under typical conditions. These
values may vary when subject to different conditions, such as SW version, network status,
application settings and environmental conditions.
Target Audience
This manual is intended for all members of the integration team who are responsible for
integrating the G24-L module into the host OEM device, including representatives from
hardware, software and RF engineering disciplines.
Manual Organization
This manual contains the following chapters:
• Chapter 1 —introduces the G24-L unit and provides important safety instructions.
• Chapter 2 —provides a detailed hardware description of the blocks and components
comprising the G24-L.
• Chapter 3 —describes the pin assignments for G24-L connectors.
• Chapter 4 —describes G24-L mechanical specifications and requirements.
• Chapter 5 —provides contact information for Motorola Service Support and Customer
Assistance.
November 15, 2008
G24-L Module Hardware Description
ix
Applicable Documents
Applicable Documents
• G24-L Developer's Kit - 6802984C10
• G24-L AT Commands - 6802983C95
Regulatory Requirements
The G24-L module is compliant with applicable FCC, IC and European R&TTE requirements.
The integrated system incorporating the G24-L module may be subject to further regulations and
standards. Motorola strongly recommends that the system integrator seeks professional advice
regarding the regulations and standards that apply to their product.
The Federal Communications Commission (FCC) requires application for certification of digital
devices in accordance with CFR Title 47, Part 2 and Part 15. This includes Electromagnetic
Energy Exposure (EME) testing. As the G24-L modem is not a standalone transceiver but is an
integrated module, the G24-L cannot be tested by itself for EME certification. It is, however, the
integrator’s responsibility to have the completed device tested for EME certification.
The module is compliant to European R&TTE directive requirements; however the complete
system (host plus G24 module) may be subject to R&TTE or other directives (for instance the
EMC directive 2004/108/EC). Motorola strongly recommends that the system integrator seek
professional advice regarding the applicable standards and directives, and most efficient route to
demonstrating compliance, and required product markings.
The G24-L module is compliant to FCC, IC and R&TTE requirements allowing use within
Europe and North America. Use in other regions may require regional "type approvals" which
the manufacturer of the final product integration or reseller will be responsible for procuring.
Many regional type approvals are based upon compliance to FCC, R&TTE, ETSI and other
standards that the G24-L is compliant with. It is strongly recommended that professional advice
be sought before placing the finished integrated product on the market to establish local approval
and marking requirements.
Safety Statement and Requirements
Certain safety precautions must be observed during all phases of the operation, usage, service or
repair of any cellular terminal or mobile incorporating the G24-L module. The integrator is
advised to consider the following general cautions in the context of their integrated system
incorporating the G24-L module, and to provide the end user with the applicable warnings and
advice of safe operation of the equipment.
Failure to comply with these precautions violates safety standards of design, manufacture and
intended use of the product. Motorola assumes no liability for customer failure to comply with
these precautions.
• The G24-L must be operated at the voltages described in the technical documentation
• The G24-L must not be mechanically nor electrically changed. Use of connectors should
follow the guidance of the technical documentation
• The G24-L is designed to meet the EMC requirements of EN301 489-1 and EN301 489-7 for
R&TTE devices using GSM
• When integrating the G24-L into a system, Motorola recommends testing the system to
EN301 489-1 and EN301 489-7 for R&TTE devices using GSM
• The G24-LC meets the safety requirements of EN60950
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G24-L Module Hardware Description
November 15, 2008
Preface
• Systems using the G24-L are subject to mandatory EMC testing under directive
2004/108/EC (see item 3 above). Other directives, such as the LVD directive 2006/95/EC,
may also apply to a system using the G24-L module
• The integrated product incorporating the G24-L moduel must be evaluated for SAR under
intended use conditions, and suitable text and SAR values be provided to the end user
• No wireless device can guarantee operation at all times due to network or interference
conditions, A user should never rely on a wireless device as the sole means of making
emergency calls
• The G24-L module complies with all applicable standards and directives, this does not
guarantee that the product it is integrated into complies, expert advice should be sought to
identify the applicable regulations and show compliance
Suitable warning statements regarding the use of RF energy in the integrated host system should
be given in the end user documentation.
Antenna and Transmission Safety Precautions
User Operation
The G24-L module is normally supplied without an antenna, and is compliant with SAR
requirements provided the following conditions are observed.
Do not operate your unit when a person is within 8 inches (20 centimeters) of the antenna. A
person or object within 8 inches (20 centimeters) of the antenna could impair call quality and may
cause the phone to operate at a higher power level than necessary.
Important:
The unit must be installed in a manner that provides a minimum separation distance
of 20 cm or more between the antenna and persons and must not be co-located or
operate in conjunction with any other antenna or transmitter to satisfy FCC RF
exposure requirements for mobile transmitting devices.
Important:
To comply with the FCC RF exposure limits and satisfy the categorical exclusion
requirements for mobile transmitters, the requirements described in the following
section, “Antenna Installation” , must be met.
Antenna Installation
• The antenna installation must provide a minimum separation distance of 20 cm from users
and nearby persons and must not be co-located or operating in conjunction with any other
antenna or transmitter.
• The combined cable loss and antenna gain must not exceed +6.8 dBi (850 band). The
combined cable loss and antenna gain must not exceed +2.2 dBi and total system output must
not exceed 2.0W EIRP in the PCS (1900) band in order to comply with the EIRP limit of
24.232 (b). OEM installers must be provided with antenna installation instruction and
transmitter operating conditions for satisfying RF exposure compliance.
• For system integrations requiring higher antenna gain, or position closer than 20cm from the
body, SAR compliance testing of the completed product will be required. It is strongly
recommended that the system integrator seeks the advice of a suitably accredited test
laboratory to develop a test plan and carry out necessary testing.
November 15, 2008
G24-L Module Hardware Description
xi
Standards
Standards
Electromagnetic Compatibility: Principles and Applications by David A Weston, published by
Marcel Dekker, Inc., 270 Madison Avenue, New York, NY 10016 USA.
GSM 07.07 - prETS 300 916, Digital cellular telecommunication system (Phase 2+); AT
command set for GSM Mobile Equipment (ME), Version 5.2.0 or higher, Reference
RE/SMG-040707QR1.
GSM 07.05, Digital cellular telecommunication system (Phase 2+); Use of Data Terminal
Equipment - Data Circuit terminating; Equipment (DTE-DCE) interface for Short Message
Service (SMS) and Cell Broadcast Service (CBS), Version 5.3.0, August, 1997, Reference
TS/SMG-040705QR2.
GSM 03.40, Digital cellular telecommunication system (Phase 2+); Technical realization of the
Short Message Service (SMS) Point-to-Point (PP), Version 5.3.0, July 1996, Reference
TS/SMG-040340QR2.
GSM 04.11 Digital cellular telecommunication system (Phase 2+); Point-to-Point (PP) Short
Message Service (SMS) support on mobile radio interface, Version 5.1.0, March 1996, Reference
TS/SMG-030411QR.
GSM 03.38, Digital cellular telecommunication system (Phase 2+); Alphabets and
language-specific information, Version 5.3.0, July 1996, Reference TS/SMG-040338QR2.
GSM 51.010-1, Digital cellular telecommunication system (Phase 2+); Mobile Station (MS)
Conformance specification; Part 1: Conformance specification (3GPP TS 51.010-1 version 7.0.1
Release 7).
GSM Specifications are orderable from Global Engineering Documents, 15 Inverness Way East,
Englewood, Colorado 80112-5704 USA 303-792-2181 800-624-3974.
ETSI Standard PCS - 11.10-1.
GSM 02.30 Supplementary services.
GSM 03.90 USSD stage 2.
GSM 11.14 SIM toolkit.
ITU-T V.25ter
GSM Data Adapter for Motorola Handsets, AT command reference, Rev 2, June 9 1997.
ETSI standard SMG31.
GSM 05.02.
ETSI 07.60.
ETSI 0.7.07 Ver. 7.5.0.
Contact Us
We at Motorola want to make this guide as helpful as possible. Keep us informed of your
comments and suggestions for improvements.
For general contact, technical support, report documentation errors and to order manuals, use this
email address:
[email protected]
Motorola appreciates feedback from the users of our information.
xii
G24-L Module Hardware Description
November 15, 2008
Preface
Text Conventions
The following special paragraphs are used in this guide to point out information that must be read.
This information may be set-off from the surrounding text, but is always preceded by a bold title
in capital letters:
Note
Note: Presents additional, helpful, noncritical information that you can use.
Warning
Warning:
Presents information to warn you of a potentially hazardous situation in which there
is a possibility of personal injury.
Important
Important:
Presents information to help you avoid an undesirable situation
or provides additional information to help you understand a topic or concept.
Caution
Caution:
November 15, 2008
Presents information to identify a situation in which damage to software, stored
data, or equipment could occur, thus avoiding
the damage.
G24-L Module Hardware Description
xiii
Field Service
Field Service
For Field Service requests, use this email address:
[email protected]
General Safety
Remember!. . . safety depends on you!
The following general safety precautions must be observed during all phases of operation,
service, and repair of the equipment described in this manual. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety standards of
design, manufacture, and intended use of the equipment. Motorola, Inc. assumes no liability for
the customer’s failure to comply with these requirements. The safety precautions listed below
represent warnings of certain dangers of which we are aware. You, as the user of this product,
should follow these warnings and all other safety precautions necessary for the safe operation of
the equipment in your operating environment.
Ground the instrument
Only suitably qualified individuals should work on the product and host system. Consideration
should be given to the safest grounding arrangement for the host application.
Do not operate in an explosive atmosphere
Do not operate the equipment in the presence of flammable gases or fumes. Operation of any
electrical equipment in such an environment constitutes a definite safety hazard.
Do not service or adjust alone
Do not attempt internal service or adjustment unless another person, capable of rendering first aid
is present. There are no user serviceable parts inside the G24-L module.
Keep away from live circuits
Operating personnel must:
• not remove equipment covers. Only Factory Authorized Service Personnel or other qualified
maintenance personnel may remove equipment covers for internal subassembly, or
component replacement, or any internal adjustment
• not replace components with power cable connected. Under certain conditions, dangerous
voltages may exist even with the power cable removed
• always disconnect power and discharge circuits before touching them
xiv
G24-L Module Hardware Description
November 15, 2008
Preface
Do not substitute parts or modify equipment
Because of the danger of introducing additional hazards, do not install substitute parts or perform
any unauthorized modification of equipment. Contact Motorola Warranty and Repair for service
and repair to ensure that safety features are maintained.
Batteries
Batteries can cause property damage and/or bodily injury such as burns if a conductive material
such as jewelry, keys, or beaded chains touch exposed terminals. The conductive material may
complete an electrical circuit (short circuit) and become quite hot. Exercise care in handling any
charged battery, particularly when placing it inside a pocket, purse, or other container with metal
objects. Use only Motorola original batteries and chargers.
Your battery may contain symbols, defined as follows:
Symbol
Definition
Important safety information will follow.
Your battery or phone should not be disposed of in a fire.
Your battery or phone may require recycling in accordance with
local laws. Contact your local regulatory authorities for more
information.
Your battery or phone should not be thrown in the trash.
Your phone contains an internal lithium ion battery.
Li Ion BATT
Dangerous procedure warnings
Warnings, such as the example below, precede potentially dangerous procedures throughout this
manual. Instructions contained in the warnings must be followed. You should also employ all
other safety precautions that you deem necessary for the operation of the equipment in your
operating environment.
Warning example:
Warning:
November 15, 2008
Dangerous voltages, capable of causing death, are present in this equipment. Use
extreme caution when handling, testing,
and adjusting.
G24-L Module Hardware Description
xv
Caring for the Environment
Caring for the Environment
The following information is provided to enable regulatory compliance with the European Union
(EU) Directive 2002/96/EC Waste Electrical and Electronic Equipment (WEEE) when using
Motorola equipment in EU countries. The finished host application should be marked with the
crossed out "wheelie bin" mark at least 7mm high if it is within the scope of the WEEE directive.
Motorola recommends that the system integrator seeks expert guidance as to the applicable
directives for the finished product.
Disposal of Motorola equipment in EU countries
Please do not dispose of Motorola G24-L in landfill sites.
In the EU, Motorola in conjunction with a recycling partner will ensure that G24-L is collected
and recycled according to the requirements of EU environmental law.
Note that the system integrator will be liable for recovery and disposal of the integrated system.
Please contact the Customer Network Resolution Center (CNRC) for assistance. The 24 hour
telephone numbers are listed at
http://mynetworksupport.motorola.com
Select Customer Network Resolution Center contact information.
Alternatively if you do not have access to CNRC or the internet, contact the Local Motorola
Office.
Disposal of Motorola equipment in non-EU countries
In non-EU countries, dispose of Motorola equipment in accordance with national and regional
regulations.
RoHS Compliance
The G24-L/LC product meets the European Union directive for RoHS compliance.
The RoHS compliance is subject to a declaration of conformity that may be viewed upon request.
xvi
G24-L Module Hardware Description
November 15, 2008
Preface
CMM Compliance
The disclosure table and symbols below are provided in accordance with Section 5 & 6 of the
People's Republic of China's "Electronic Industry Marking Standard for Control of Pollution
Caused by Electronic Information Products". The disclosure table and symbols shown below
cover the electronic information product (EIP) supplied.
᳝↦᳝ᆇ⠽䋼៪‫ܗ‬㋴
䚼ӊৡ⿄
䪙˄Pb˅
∲˄Hg˅
䬝˄Cd˅
݁Ӌ䫀 ໮⒈㘨㣃 ໮⒈Ѡ㣃䝮
Cr6+)
˄PBB˅ ˄PBDE˅
R˖㸼⼎䆹᳝↦᳝ᆇ⠽䋼೼䆹䚼ӊ᠔᳝ഛ䋼ᴤ᭭Ёⱘ৿䞣ഛ೼SJ/T 11363-2006
ᷛ‫ޚ‬㾘ᅮⱘ䰤䞣㽕∖ҹϟDŽ
×˖㸼⼎䆹᳝↦᳝ᆇ⠽䋼㟇ᇥ೼䆹䚼ӊⱘᶤϔഛ䋼ᴤ᭭Ёⱘ৿䞣䍙ߎSJ/T 11363-2006
ᷛ‫ޚ‬㾘ᅮⱘ䰤䞣㽕∖DŽ
Cellular Phone
x
o
o
o
o
o
Battery
x
o
o
o
o
o
Accessories
x
o
o
o
o
o
The two symbols shown below indicate the product is recyclable and the number denotes the
Environmental Friendly Use Period for the EIP indicated above it.
Transceiver Module & Accessories
Except Battery
Battery
Limitation of Liability
The Products are not designed, intended, or authorized for use as components in systems intended
for surgical implant into the body; in other applications intended to support or sustain life; for the
planning, construction, maintenance, operation or use of any nuclear facility; for the flight,
navigation, communication of aircraft or ground support equipment; or in any other application in
which the failure of the Product could create a situation where personal injury or death may occur.
If CUSTOMER should use any Product or provide any Product to a third party for any such use,
CUSTOMER hereby agrees that MOTOROLA is not liable, in whole or in part, for any claims or
damages arising from such use, and further agrees to indemnify and hold MOTOROLA harmless
from any claim, loss, cost or damage arising from such use.
EXCEPT AS SPECIFICALLY STATED ABOVE, THE PRODUCTS ARE PROVIDED "AS IS"
AND MOTOROLA MAKES NO OTHER WARRANTIES EXPRESS, IMPLIED,
STATUTORY, OR OTHERWISE REGARDING THE PRODUCTS. MOTOROLA
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF
DEALING OR USAGE OF TRADE.
Under no circumstances shall MOTOROLA be liable to CUSTOMER or any other party for any
costs, lost revenue or profits or for any other special, incidental or consequential damages, even if
November 15, 2008
G24-L Module Hardware Description
xvii
Warranty Notification
MOTOROLA has been informed of such potential loss or damage. And in no event shall
MOTOROLA's liability to CUSTOMER for damages of any nature exceed the total purchase
price CUSTOMER paid for the Product at issue in the dispute, except direct damages resulting
from patent and/or copyright infringement, which shall be governed by the "INDEMNITY"
Section of this Agreement.
The preceding states MOTOROLA's entire liability for MOTOROLA's breach or failure to
perform under any provision of this Agreement.
Warranty Notification
Motorola guarantees to you, the original purchaser, the OEM module and accessories which you
have purchased from an authorized Motorola dealer (the "Products"), to be in conformance with
the applicable Motorola specifications current at the time of manufacture for a term of [1] year
from date of purchase of the Product(s) (Warranty Term).
You must inform Motorola of the lack of conformity to the applicable specifications of any of the
Products within a period of two (2) months from the date on which you detect a defect in
material, workmanship or lack of conformity and in any event within a term not to exceed the
Warranty Term, and must immediately submit the Product for service to Motorola's Authorized
Repair or Service Center. Motorola shall not be bound by Product related statements not directly
made by Motorola nor any warranty obligations applicable to the seller.
A list of the Motorola Call Center numbers is enclosed with this Product.
During the Warranty term, Motorola will, at its discretion and without extra charge, as your
exclusive remedy, repair or replace your Product which does not comply with this warranty; or
failing this, to reimburse the price of the Product but reduced to take into account the use you
have had of the Product since it was delivered. This warranty will expire at the end of the
Warranty Term.
This is the complete and exclusive warranty for a Motorola OEM module and accessories and in
lieu of all other warranties, terms and conditions, whether express or implied.
Where you purchase the product other than as a consumer, Motorola disclaims all other
warranties, terms and conditions express or implied, such as fitness for purpose and satisfactory
quality.
In no event shall Motorola be liable for damages nor loss of data in excess of the purchase price
nor for any incidental special or consequential damages* arising out of the use or inability to use
the Product, to the full extent such may be disclaimed by law.
This Warranty does not affect any statutory rights that you may have if you are a consumer, such
as a warranty of satisfactory quality and fit for the purpose for which products of the same type
are normally used under normal use and service, nor any rights against the seller of the Products
arising from your purchase and sales contract.
(*)including without limitation loss of use, loss of time, loss of data, inconvenience, commercial
loss, lost profits or savings.
How to Get Warranty Service?
In most cases the authorized Motorola dealer which sold and/or installed your Motorola OEM
module and original accessories will honor a warranty claim and/or provide warranty service.
Alternatively, for further information on how to get warranty service please contact either the
xviii
G24-L Module Hardware Description
November 15, 2008
Preface
customer service department of your service provider or Motorola's service centers, listed in
Chapter 5.
Claiming
In order to claim the warranty service you must return the OEM module and/or accessories in
question to Motorola's Authorized Repair or Service Center in the original configuration and
packaging as supplied by Motorola. Please avoid leaving any supplementary items like SIM
cards. The Product should also be accompanied by a label with your name, address, and telephone
number; name of operator and a description of the problem.
In order to be eligible to receive warranty service, you must present your receipt of purchase or a
comparable substitute proof of purchase bearing the date of purchase. The phone should also
clearly display the original compatible electronic serial number (IMEI) and mechanic serial
number [MSN]. Such information is contained with the Product.
You must ensure that all and any repairs or servicing is handled at all times by a Motorola
Authorized Service Center in accordance with the Motorola Service requirements
In some cases, you may be requested to provide additional information concerning the
maintenance of the Products by Motorola Authorized Service Centers only, therefore it is
important to keep a record of any previous repairs, and make them available if questions arise
concerning maintenance.
Conditions
This warranty will not apply if the type or serial numbers on the Product has been altered, deleted,
duplicated, removed, or made illegible. Motorola reserves the right to refuse free-of-charge
warranty service if the requested documentation can not be presented or if the information is
incomplete, illegible or incompatible with the factory records.
Repair, at Motorola's option, may include reflashing of software, the replacement of parts or
boards with functionally equivalent, reconditioned or new parts or boards. Replaced parts,
accessories, batteries, or boards are warranted for the balance of the original warranty time
period. The Warranty Term will not be extended. All original accessories, batteries, parts, and
OEM module equipment that have been replaced shall become the property of Motorola.
Motorola does not warrant the installation, maintenance or service of the products, accessories,
batteries or parts.
Motorola will not be responsible in any way for problems or damage caused by any ancillary
equipment not furnished by Motorola which is attached to or used in connection with the
Products, or for operation of Motorola equipment with any ancillary equipment and all such
equipment is expressly excluded from this warranty.
When the Product is used in conjunction with ancillary or peripheral equipment not supplied by
Motorola, Motorola does not warrant the operation of the Product/peripheral combination and
Motorola will not honor any warranty claim where the Product is used in such a combination and
it is determined by Motorola that there is no fault with the Product. Motorola specifically
disclaims any responsibility for any damage, whether or not to Motorola equipment, caused in
any way by the use of the OEM module, accessories, software applications and peripherals
(specific examples include, but are not limited to: batteries, chargers, adapters, and power
supplies) when such accessories, software applications and peripherals are not manufactured and
supplied by Motorola.
November 15, 2008
G24-L Module Hardware Description
xix
What is Not Covered by the Warranty
What is Not Covered by the Warranty
This warranty is not valid if the defects are due to damage, misuse, tampering, neglect or lack of
care and in case of alterations or repair carried out by unauthorized persons.
The following are examples of defects or damage not covered by this product warranty
1. Defects or damage resulting from use of the Product in other than its normal and customary
manner.
2. Defects or damage from misuse, access to incompatible sources, accident or neglect.
3. Defects or damage from improper testing, operation, maintenance, installation, adjustment,
unauthorized software applications or any alteration or modification of any kind.
4. Breakage or damage to antennas unless caused directly by defects in material or
workmanship.
5. Products disassembled or repaired other than by Motorola in such a manner as to adversely
affect performance or prevent adequate inspection and testing to verify any warranty claim.
6. Defects or damage due to range, coverage, availability, grade of service, or operation of the
cellular system by the cellular operator.
7. Defects or damage due to moist, liquid or spills of food.
8. Control unit coil cords in the Product that are stretched or have the modular tab broken.
9. All plastic surfaces and all other externally exposed parts that are scratched or damaged due
to customer normal use.
Depending on operating conditions and your usage habits, wear and tear might take place of
components including mechanical problems related to Product housing, paint, assembly,
sub-assemblies, displays and keyboards and any accessories which are not part of the Product's
in-box configuration. The rectification of faults generated through wear and tear and the use of
consumable items like batteries beyond their Optimum Performance Time as indicated in the
product manual is considered to be your responsibility and therefore Motorola will not provide
the free Warranty repair service for these items
Installed Data
Please make and retain a note of all data you have inserted into your Product for example names,
addresses, phone numbers, user and access codes, notes etc. before submitting your Product for a
Warranty service as such data may be deleted or erased as part of the repair or service process.
Please note if you have downloaded material onto your product, these may be deleted or erased as
part of the repair process or testing process. Motorola shall not be responsible for such matters.
The repair or testing process should not affect any such material that was installed by Motorola
on your Product as a standard feature.
Out of Warranty Repairs
If you request Motorola to repair your Product any time after the Warranty term or where this
warranty does not apply due to the nature of the defect or fault, then Motorola may in its
discretion carry out such repairs subject to you paying Motorola its fees for such a repair or it may
refer you to an authorized third party to carry out such repairs.
xx
G24-L Module Hardware Description
November 15, 2008
Preface
Revision History
Manual Number
6802984C05-D
Manual Title
G24-L Module Hardware Description
Version Information
The following table lists the manual version, date of version, and remarks about
the version.
Revision History
Version
Date Issue
A
September 25, 2007
B
January 15, 2008
Remarks
Initial Release
New sub-paragraph “Power Supply A/D” , under “A/D
Interface” .
Updated values in the following tables: 2-4, 2-6, 2-7, 2-8,
2-9 and 2-25.
C
April 15, 2008
Updated values in the following tables: 2-4 and 3-3.
D
November 15, 2008
Updated SIM Design Guidelines paragraph.
November 15, 2008
G24-L Module Hardware Description
xxi
Revision History
xxii
G24-L Module Hardware Description
November 15, 2008
Chapter 1: Introduction
The G24-L is the newest member of Motorola's embedded cellular modules family.
Designed with quad band GSM capabilities, which supports all four GSM bands 850/900/1800/1900 MHz, and with GPRS multislot class 10, G24-L can operate on any
GSM/GPRS network to provide voice and data communications.
The G24-L is similar to a condensed cellular phone core, which can be integrated into any system
or product that needs to transfer voice or data information over a cellular network. Thus, it
significantly enhances the system's capabilities, transforming it from a standalone, isolated
product to a powerful high-performance system with global communications capabilities.
The G24-L is designed as a complete GSM communications solution with all the controls,
interfaces and features to support a broad range of applications:
• A powerful audio interface.
•
•
•
•
A large set of indicators and control signals.
Several advanced power-saving modes.
A variety of serial communications solutions.
An optional battery charging interface for battery powered applications.
All these features and interfaces are easily controlled and configured using a versatile AT
command interface that provides full control over the G24-L operation.
The G24-L control and indication interface extends its capabilities beyond GSM
communications. This includes an A/D and GPIO interface, and a regulated output voltage for
supplying external circuits. With these interfaces, the G24-L can operate and control external
applications and receive feedback from external environment and circuits.
The G24-L interface design, using a single 70 pin board-to-board connector, through which all
application interfaces are managed, facilitates fast and easy integration. It significantly shortens
the development process, and minimizes the product's time to market.
The G24-L is extremely compact in size with a slim mechanical design, which makes it space
saving on the application board and easily fitted into any board design.
The advanced power supply management significantly reduces power consumption to a
necessary minimum and prolongs battery life.
November 15, 2008
G24-L Module Hardware Description
1
Product Specifications
Product Specifications
Important:
For safety regulations and requirements, see “Regulatory Requirements” on page x,
“Safety Statement and Requirements” on page x and “Antenna and Transmission
Safety Precautions” on page xi in “Preface” .
Note: Motorola reserves the right to change the specifications without prior notice.
Table 1-1: Product Specifications
Product Features
Operating systems:
GSM 850/GSM 900
DCS 1800/PCS 1900
Physical Characteristics
2
Dimensions:
45.2 x 24.4 x 6.5 mm
Mounting:
Two Ø2.4 mm holes
Weight:
9 grams
G24-L Module Hardware Description
November 15, 2008
Table 1-1: Product Specifications (Cont.)
Environmental
Operational temperature:
-20°C to +75°C
Storage temperature:
-40°C to +85°C
Performance
Operating voltage:
3.3 - 4.2 V
Current consumption:
2.5 mA @ DRX9 (Sleep mode)
Maximum Tx output power:
GSM 850/GSM 900: Power class 4 (33 + 2 dBm)
DCS 1800/PCS 1900: Power class 1 (30 + 2 dBm)
Interfaces
Connectors:
Single 70-pin, board-to-board
RF MMCX
SIM Card:
External SIM connectivity
3.0 V/1.8 V
Serial Ports:
UART:
BR from 300 bps to 115200 bps
Auto BR
USB:
USB full-speed device specifications, Rev. 1.1
Data Features
GPRS:
Multi-slot class 10 (4 Rx/2 Tx/5 Sum)
Max Downlink BR 85.6 kbps
Coding scheme CS1-CS4
CSD:
Max BR 14.4 kbps
SMS:
MO/MT Text and PDU modes
Cell broadcast
Voice Features
Telephony
Digital audio
Differential analog audio lines
EFR/HR/FR/AMR
Vocoders
DTMF support
Audio control:
November 15, 2008
Echo suppression, noise suppression, side tone and gain
control
G24-L Module Hardware Description
3
Product Specifications
Table 1-1: Product Specifications (Cont.)
GSM Supplementary Service
USSD Phase II
Call forwarding
Call hold, waiting and multiparty
Call diverting
Missed-call indicator
AOC
Call barring
Character Set
UTF8
UCS2
ASCII
GSM
8859-1
Control/Status Indicators
GSM/GPRS coverage
Wakeup
TX enable
Reset
Antenna Detect
AT Command Set
GSM 07.05
GSM 07.07
Motorola proprietary AT commands
Accessories
Firmware data loader
Data logger
Developer Kit
4
G24-L Module Hardware Description
November 15, 2008
Regulatory Approvals
The G24-L module has been tested and approved under the standards and regulations listed
below:
• FCC - part 15, 22, 24
•
•
•
•
R&TTE - LVD 2006/95/EC, standards: EN301 489-1 & 7, EN60950
GCF 3.27.1
NAPRD 3.14.0
IC
European Union Directives Conformance Statement
Hereby, Motorola declares that this product is in compliance with
• The essential requirements and other relevant provisions of
Directive 1999/5/EC
• All other relevant EU Directives
IMEI: 350034/40/394721/9
0168
Type: G24-L
Product
Approval
Number
The above gives an example of a typical Product Approval Number.
You can view your product's Declaration of Conformity (DoC) to Directive 1999/5/EC (the
R&TTE Directive) at www.motorola.com/rtte - to find your DoC, enter the product Approval
Number from your product's label in the "Search" bar on the Web site.
Important:
The following paragraphs must be addressed by the integrator to ensure their host is
in compliance to the G24-L FCC grant and/or the FCC grant of the host device.
CFR 47 Part 15.19 specifies label requirements
The following text may be on the product, user's manual, or container.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
November 15, 2008
G24-L Module Hardware Description
5
Regulatory Approvals
CFR 47 Part 15.21 Information to user
The user's manual or instruction manual for an intentional or unintentional radiator shall caution
the user that changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment. In cases where the manual is
provided only in a form other than paper, such as on a computer disk or over the Internet, the
information required by this section may be included in the manual in that alternative form,
provided the user can reasonably be expected to have the capability to access information in that
form.
CFR 47 Part 15.105 Information to the user
(b) For a Class B digital device or peripheral, the instructions furnished the user shall include the
following or similar statement, placed in a prominent location in the text of the manual:
Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
6
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
The following paragraphs describe in details the hardware requirements for properly interfacing
and operating the G24-L module.
Architecture Overview
Figure 2-1 below illustrates the primary functional components of the G24-L.
Figure 2-1: G24-L Block Diagram
November 15, 2008
G24-L Module Hardware Description
7
Architecture Overview
The G24-L consists of the following blocks:
Digital Block
• Micro-controller Unit (MCU) for system and user code execution.
• Digital Signal Processor (DSP) for voice and data processing.
• Serial communications interfaces.
• USB driver interface
• UART
• SIM card
• Digital audio (PCM) bus interface.
• General purpose IO signals.
Analog Block
• Power Management IC (PMIC).
• Internal regulators
• 1 external regulator for customer use
• Analog audio interface management.
• Speaker, microphone
• Alert speaker
• Headset
• Real Time Clock (RTC) subsystem.
GSM Transceiver Block
• RF power amplifier.
• 3 gain stages for the low GSM band and high GSM band
• 850/900/1800/1900 MHz
• RF receiver is integrated in the MCU and processed by the DSP.
• Signal processing IC for transmit and receive GSM data processing.
• FEM - Front End Module.
• Includes a harmonic filter and antenna switch
• Filter - Quad-band SAW filter that selects the required receive band.
8
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Operating Modes
G24-L incorporates several operating modes. Each operating mode is different in the active
features and interfaces.
Table 2-1 summarizes the general characteristics of the G24-L operating modes and provides
general guidelines for operation.
Table 2-1: G24-L Operating Modes
Mode
Description
Features
Not Powered
VCC supply is disconnected.
The G24-L is Off.
Any signals connected to the interface connector must be set low or tri-state.
RTC Mode
Valid VCC supply.
RESET_N signal is enabled (low).
The G24-L Interfaces are Off. Only the internal RTC timer is operating. Any signals
connected to the interface connector must be
set low or tri-stated.
Idle Mode
RESET_N signal is disabled (high).
CTS_N and DSR_N signals are enabled
(low).
The G24-L is fully active, registered to the
GSM network and ready to communicate.
This is the default power-up mode.
Sleep Mode
RESET_N signal is high.
CTS_N signal is disabled.
The G24-L is in low power mode.
The application interfaces are disabled, but,
G24-L continues to monitor the GSM network.
CSD call or
GPRS data
RESET_N signal is high.
TXEN_N signal is toggling.
A GSM voice or data call is in progress.When
the call terminates, G24-L returns to the last
operating state (Idle or Sleep).
November 15, 2008
G24-L Module Hardware Description
9
Power Supply
Power Supply
The G24-L power supply must be a single external DC voltage source of 3.3V to 4.2V. The power
supply must be able to sustain the voltage level during a GSM transmit burst current surge, which
may reach 2.0A.
The G24-L interface connector has 8 contacts for the main power supply, as described in
Table 2-2. All these contacts must be used for proper operation.
Table 2-2: Power Supply Signals
Pin #
Signal Name
1-4
GND
5-8
VCC
Description
Main ground connection for
G24-L module.
DC supply input for G24-L module.
VIN = 3.3 V to 4.2 V
IRMS = 550 mA during multislot
transmission
IMAX = 2 A during transmit bursts
Power Supply Design
Special care must be taken when designing the power supply of the G24-L. The single external
DC power source indirectly supplies all the digital and analog interfaces, but also directly
supplies the RF power amplifier (PA). Therefore, any degradation in the power supply
performance, due to losses, noises or transients, will directly affect the G24-L performance.
The burst-mode operation of the GSM transmission and reception, draws instantaneous current
surges from the power supply, which causes temporary voltage drops of the power supply level.
The transmission bursts consume the most instantaneous current, and therefore cause the largest
voltage drop. If the voltage drops are not minimized, the frequent voltage fluctuations may
degrade the G24-L performance.
Figure 2-2 illustrates the power supply behavior during GSM transmission.
Figure 2-2: Transmission Power Drops
10
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
It is recommended that the voltage drops during a transmit burst will not exceed 300mV,
measured on the G24-L interface connector. In any case, the G24-L supply input must not drop
below the minimum operating level during a transmit burst. Dropping below the minimum
operating voltage may degrade the module performance.
To minimize the losses and transients on the power supply lines, it is recommended to follow
these guidelines:
• Use a 1000 uF, or greater, low ESR capacitor on the G24-L supply inputs. The capacitor
should be located as near to the G24-L interface connector as possible.
• Use low impedance power source, cabling and board routing.
• Use cabling and routing as short as possible.
• Filter the G24-L supply lines using filtering capacitors, as described in Table 2-3.
Table 2-3: Recommended Power Supply Filtering
Capacitor
Usage
Description
1000 uF
GSM Transmit current
serge
Minimizes power supply
losses during transmit
bursts.
Use maximum possible
value.
10 nF, 100 nF
Digital switching noise Filters digital logic noises
from clocks and data sources.
8.2 pF, 10 pF
1800/1900 MHz GSM
bands
Filters transmission EMI.
33 pF, 39 pF
850/900 MHz GSM
bands
Filters transmission EMI.
Power Consumption
Table 2-4 specifies typical G24-L current consumption ratings in various operating modes. The
current ratings refer to the overall G24-L current consumption over the VCC supply.
Table 2-4: G24-L Current Ratings
Parameter
Description
Conditions
IOFF
RTC mode
IIDLE
Idle mode
Registered
ISLEEP
Low power mode
DRx
IGSM-RMS
Average current
GSM voice 1 TX slot
1 Rx slot
November 15, 2008
Min
Typ
Max
Unit
50
µA
20
mA
2
9
3.3
2.0
mA
850/900 (PCL 5)
1800/1900 (PCL 0)
300
230
mA
G24-L Module Hardware Description
11
Power Supply
Table 2-4: G24-L Current Ratings (Cont.)
Parameter
12
Description
Conditions
Min
Typ
Max
Unit
IGPRS-RMS
Average current
GPRS Class 10 2 TX slot
3 Rx slot
850/900 (PCL 5)
1800/1900 (PCL 0)
500
420
mA
IGSM-MAX
Maximum TX current burst
850/900 (PCL 5)
1800/1900 (PCL 0)
2000
1500
mA
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Power On/Off Operation
The G24-L power on and off process includes two primary phases, which are indicated at the
interface connector by the hardware output signals RESET_N and CTS_N.
The RESET_N signal indicates whether G24-L is powered on or off.
When this signal is enabled (low), G24-L is powered-off. When it is disabled (high), G24-L is
powered-on.
The CTS_N signal indicates the serial communications interface (UART) status. When this signal
is high, the G24-L serial interface is disabled. When it is low, the serial interface is enabled, and
G24-L is ready to communicate.
Important:
Do not operate the G24-L out of its electrical or environmental limits. Refer to the
specifications chapter for details of these limits.
Important:
The G24-LC model with battery charger will not turn-on unless all the battery
terminals are connected as required, and the battery voltage is above the minimum
operating level. Refer to “Battery Charger Interface” on page 47 for more
information.
Turning the G24-L On
When the G24-L power supply is stable above the minimum operating level and G24-L is
powered off, only the internal RTC timer is active.
When G24-L is turned on, by any of the methods described below, it will first perform an
automatic internal system-test, during which basic functions are verified. The system-test
duration is typically 800 milliseconds. When the system-test has completed G24-L resumes
normal operation.
During the internal system-test process G24-L may toggle several interface signals, which are
visible to the application. These signals do not represent any valid state or data, and should be
ignored by the customer application until the system-test has completed.
Turning the G24-L On Using ON_N
The ON_N input signal is set high, to VCC level, by an internal pull-up resistor whenever a
power supply is applied to G24-L. Therefore, it is recommended to operate this signal using an
open collector/drain circuit connection.
Asserting the ON_N signal low for a minimum of 500 milliseconds (0.5 seconds) and a maximum
of 1.5 seconds will cause the G24-L to turn-on.
November 15, 2008
G24-L Module Hardware Description
13
Power On/Off Operation
Figure 2-3 illustrates the power-on process using the ON_N signal.
Figure 2-3: ON_N Power On Timing
Turning the G24-L On Using IGN
To turn on G24-L, the IGN signal must be asserted high. The IGN signal must remain high for the
duration of the G24-L operation. G24-L powers down when the IGN signal is returned to its low
state.
Figure 2-4 illustrates the power-on process using the IGN signal.
Figure 2-4: IGN Power On Timing
Important:
14
The Ignition signal functionality is disabled in the G24-LC charger model. This
signal is used for external charger supply application and doesn't function as
specified herein. Refer to “Battery Charger Interface” on page 47 for more
information.
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Turning the G24-L Off
There are several ways to turn the G24-L off:
• Asserting the ON_N signal low for a minimum of 2 seconds.
• Setting the IGN signal low.
• AT command.
Turning the G24-L Off Using ON_N
Asserting the ON_N signal low for a minimum of 2 seconds will turn G24-L off. This will initiate
a normal power-off process, which includes disabling of all applications interfaces (UART, SIM
card, audio, etc.) and closing the network connection.
Figure 2-5 illustrates the power-off timings when using the ON_N signal.
Figure 2-5: ON_N Power Off Timing
Turning the G24-L Off Using IGN
The IGN signal may be used to power off G24-L only if it was also used to power it on. When the
IGN signal is set low, G24-L will turn off. This will initiate a normal power-off process, which
includes disabling of all applications interfaces (UART, SIM card, audio, etc.) and closing the
network connection.
The IGN signal will not power off G24-L before 30 seconds have elapsed since G24-L was
powered-on. This delay mechanism is implemented to protect G24-L from unexpected transients
on the IGN line during power up, particularly when applying vehicle cranking waveforms.
November 15, 2008
G24-L Module Hardware Description
15
Power On/Off Operation
Figure 2-6 illustrates the power-off timings when using the IGN signal.
Figure 2-6: IGN Power Off Timing
Turning the G24-L Off Using AT+MRST
The AT+MRST command initiates a G24-L system reset operation, which powers off the G24-L.
This command emulates the ON_N signal operation for power off.
Power Loss shut down
A low power shut down occurs when G24-L senses the external power supply is below the
minimal operating limit. The module will respond by powering down automatically without
notice.
This form of power-down is not recommended for regular use since the unexpected power loss
may result in loss of data.
16
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Low Power Mode
The G24-L incorporates an optional low power mode, called Sleep Mode, in which it operates in
minimum functionality, and therefore draws significantly less current. During low power mode
the G24-L network connection is not lost. G24-L continues to monitor the GSM network
constantly for any incoming calls or data.
During low power mode, all of the G24-L interface signals are inactive and are kept in their
previous state, prior to activating low power mode. To save power, all the G24-L internal clocks
and circuits are shut down, and therefore serial communications is limited.
Activating Low Power Mode
By default, the G24-L powers on in Idle mode. In this mode the G24-L interfaces and features are
functional and the module is fully active.
Low power mode is activated by the ATS24 command. The value set by this command
determines the inactive state duration required by G24-L, in seconds, after which G24-L will
enter sleep mode.
For example:
ATS24 = 1 activates low power mode after 1 second of inactivity.
ATS24 = 5 activates low power mode after 5 seconds of inactivity.
ATS24 = 0 disables low power mode (default).
Figure 2-7 illustrates the ATS24 command operation.
Figure 2-7: ATS24 Operation
Important:
November 15, 2008
G24-L will not enter low power mode in any case when there is data present on the
serial interface or incoming from the GSM network or an internal system task is
running. Only when processing of any external or internal system task has
completed, and G24-L is inactive for the duration of ATS24, it will enter low power
mode.
G24-L Module Hardware Description
17
Low Power Mode
Important:
G24-L will not enter low power mode when USB is operating. Connecting USB to
the G24-L will disable the low power mode operation.
Serial Interface During Low Power Mode
During low power mode the G24-L serial interfaces are disabled. This is indicated by the CTS
signal high state.
The G24-L wakes up periodically from low power mode to page the GSM network for any
incoming calls or data. After this short paging is completed, G24-L returns to low power mode.
During this short awake period, the serial interfaces are enabled and communications with the
module is possible.
The CTS_N signal is alternately enabled and disabled synchronously with the network paging
cycle. CTS_N is enabled whenever G24-L awakes to page the network. This indicates the G24-L
serial interfaces are active (see Figure 2-8).
Figure 2-8: CTS Signal During Sleep Mode
The periodical enabling and disabling of the CTS_N signal during low power mode can be
controlled by the AT+MSCTS command.
Setting AT+MSCTS=1 permanently disables the serial interface during low power mode, even
during a network page by G24-L. The CTS_N signal is disabled, and therefore the serial
interfaces are blocked.
Terminating Low Power Mode
Terminating the low power mode, or wake-up, is defined as the transition of the G24-L operating
state from Sleep mode to Idle mode. There are several ways to wake-up G24-L from low power
mode as described below.
Important:
18
During power saving mode the G24-L internal clocks and circuits are disabled, in
order to minimize power consumption. When terminating the power saving mode,
and switching to Idle mode, G24-L requires a minimal delay time to reactivate and
stabilize its internal circuits before it can respond to application data.
This delay is typically of 10 milliseconds, and is also indicated by the CTS_N signal
inactive (high) state. The delay guarantees that data on the serial interface is not lost
or misinterpreted.
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Temporary Termination of Low Power Mode
Temporary termination of low power mode occurs when G24-L switches from Sleep mode to Idle
mode for a defined period, and then returns automatically to Sleep mode.
Low power mode may be terminated temporarily by several sources, some of which are user
initiated and others are initiated by the system.
Using the WKUPI_N signal
The WKUPI_N signal is an active low input, that is set high by default. By asserting this signal
low the application can wake-up G24-L from low power mode and switch to Idle mode.
G24-L will remain in Idle mode, awake and fully active, as long as WKUPI_N signal remains
low. When this signal is disabled and set high again, G24-L will return to Sleep mode
automatically, according to the ATS24 settings (see Figure 2-9).
Figure 2-9: WKUPI_N Signal Operation
The WKUPI_N signal is the recommended method to temporarily wake-up G24-L from low
power mode. It provides the application full control of the G24-L operating mode and guarantees
that data on the serial interface will not be lost or misinterpreted.
The WKUPI_N signal must be used to wake up G24-L from low power mode if the serial
interface has been disabled by the AT+MSCTS command.
Incoming Network Data
During low power mode, G24-L continues monitoring the GSM network for any incoming data,
message or voice calls.
When G24-L receives an indication from the network that an incoming voice call, message or
data is available, it automatically wakes up from low power mode to alert the application. When
G24-L has completed to process all the tasks related to the incoming data, it will automatically
return to low power mode according to the ATS24 settings.
Depending on the type of network indication and the application settings, G24-L may operate in
several methods, which are configurable by AT commands, to alert the application of the
incoming data:
• Enable the WKUPO_N signal to wake-up the application from low power.
• Send data to the application over the serial interface.
• Enable the serial interface's Ring Indicator (RI_N) signal.
November 15, 2008
G24-L Module Hardware Description
19
Low Power Mode
Data on the Serial interface
While G24-L is temporarily awake in Idle mode, data may be transmitted on the serial interface.
In case data is being transmitted in any direction, G24-L will not return to low power mode. This
is regardless of the original wake-up reason or source. G24-L will remain awake while data is
transferred.
Only when the serial interface transfer is completed and the data has been processed, G24-L will
return to low power mode automatically, according to the ATS24 settings (see Figure 2-10).
Figure 2-10: Serial Interface Data
Permanent termination of Low Power Mode
The G24-L low power mode is enabled and disabled by the ATS24 command.
To permanently terminate the G24-L low power mode, the ATS24 = 0 command must be used.
Setting ATS24 = 0 disables the currently active low power mode and switches G24-L to Idle
mode.
G24-L will not return to low power mode until an ATS24 > 0 commands is set again.
This command can be sent only when the serial interface is active.
In case the serial interface is disabled, it must first be activated before sending this command. To
reactivate the serial interface, a temporary termination of the low power mode is required, as
described in “Temporary Termination of Low Power Mode” on page 19.
Following the temporary low power mode termination, the serial interface will activate and the
ATS24 = 0 command can be received by G24-L.
20
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Real Time Clock
G24-L incorporates a Real Time Clock (RTC) mechanism that performs many internal functions,
one of which is keeping time. The RTC subsystem is embedded in the PMIC and operates in all of
the G24-L operating modes (Off, Idle, Sleep), as long as power is supplied above the minimum
operating level.
The G24-L time and date can be set using the following methods:
• Automatically retrieved from the GSM network.
In case G24-L is operated in a GSM network that supports automatic time zone updating, it
will update the RTC with the local time and date upon connection to the network. The RTC
will continue to keep the time from that point.
• Using the AT+CCLK command.
Setting the time and date manually by this AT commands overrides the automatic network
update.
Once the time and date are manually updated, the RTC timer will keep the time and date
synchronized regardless of the G24-L operating state.
When the power supply is disconnected from G24-L, the RTC timer will reset and the current
time and date will be lost. On the next G24-L power-up the time and date will need to be set again
automatically or manually.
November 15, 2008
G24-L Module Hardware Description
21
Serial Interfaces
Serial Interfaces
G24-L includes two completely independent serial communications interfaces, which may be
used by the application for several purposes.
UART
The G24-L UART is a standard 8-signal bus. The UART is used for all the communications with
G24-L - AT commands interface, GPRS data and CSD data, programming and software upgrades.
The UART signals are active low CMOS level signals. For standard RS232 communications with
a PC, an external transceiver is required.
G24-L is defined as a DCE device, and the user application is defined as the DTE device. These
definitions apply for the UART signals naming conventions, and the direction of data flow, as
described in Figure 2-11.
Figure 2-11: UART Interface Signals
The G24-L primary UART supports baud rates 300, 600, 1200, 2400, 4800, 9600, 19200, 38400,
57600 and 115200 bps.
Auto baud rate detection is supported for baud rates up to 115200 bps.
All flow control handshakes are supported: hardware, software, or none.
Parity bit and Stop bit definitions are also supported.
The UART default port configuration is 8 data bits, 1 stop bit and no parity, with hardware flow
control and auto baud rate detect enabled.
Important:
22
The G24-L UART will not send data over the serial interface in case the DTR_N
and/or RTS_N input signals are disabled (set high). Therefore, regardless of the
handshake method, it is still required to enable these signals for proper operation, by
asserting them low.
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
USB Interface
G24-L incorporates a standard Universal Serial Bus (USB) interface.
The G24-L USB electrical interface and protocol conform to the USB 1.1 full-speed
specifications. G24-L is defined as a USB device on the USB bus and does not support hub or
host functionality.
USB may be used for standard communications with G24-L, as done through the UART
interface.
Important:
When USB is active, G24's low power mode cannot be operated.
The USB interface signals are shown in Figure 2-12.
Figure 2-12: USB Interface Signals
SIM Interface
The G24-L incorporates a SIM interface, which conforms to the GSM 11.11 and GSM 11.12
standards, that are based on the ISO/IEC 7816 standard. These standards define the electrical,
signaling and protocol specifications of a GSM SIM card.
G24-L does not incorporate an on-board SIM card tray for SIM placement. The SIM must be
located on the user application board, external to the G24-L. The G24-L SIM interface includes
all the necessary signals, which are routed to the interface connector, for a direct and complete
connection to an external SIM.
G24-L supports dynamic detection of the SIM card, through a dedicated SIM detection signal.
G24-L will detect a SIM card insertion or removal upon power up or during operation by the
transitions on the SIM_PD_N signal.
November 15, 2008
G24-L Module Hardware Description
23
SIM Interface
SIM Connection
Figure 2-13 illustrates a typical SIM interface connection to G24-L. This connection type is
implemented on the G24-L Developer Board, using an FCI SIM tray, PN 7111S1615A05.
Figure 2-13: G24-L SIM Interface
Table 2-5 details the SIM interface signals.
Table 2-5: SIM Interface Signals
Pin #
Signal Name
Description
48
SIM_VCC
2.85V/1.80V Supply to the SIM
44
SIM_RST_N
Active low SIM reset signal
52
SIM_DIO
Serial input and output data
46
SIM_CLK
Serial 3.25 MHz clock
50
SIM_PD_N
Active low SIM card presence
detection
SIM Design Guidelines
The SIM interface and signals design is important for proper operation of G24-L and the SIM
card. Below are several design guidelines that must be followed to achieve a robust and stable
design that meets the required standards and regulations.
• Two 100nF low ESR capacitors must be placed, in parallel, on the SIM_VCC signal line.
The capacitors should be located as near as possible to the SIM card tray contacts.
The capacitors value may slightly change depending on the application design.
• A 56Ω series resistor must be placed on the SIM_DIO signal line.
The resistor value may slightly change depending on the application design.
24
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
• A 100Ω series resistor must be placed on the SIM_CLK signal line.
•
•
•
•
•
•
•
November 15, 2008
The resistor value may slightly change depending on the application design.
It is recommended to design component placeholders (unpopulated) for capacitors on the
SIM_RST and SIM_DIO signal lines.
The SIM card tray should be located, and its signals should be routed, away from any
possible EMI sources, such as the RF and digital switching signals.
The SIM interface signals length should not exceed 100mm between the G24-L interface
connector and the SIM tray.
The SIM clock and data signals (SIM_CLK and SIM_DIO) should be routed separately on
the application board, and preferably isolated by a surrounding ground plane.
In case that transient suppressors (zener diodes, etc.) are used by the application on the SIM
card signals, individual package components (not arrays) with low capacitance should be
used.
The G24-L interface does not support SIM programming through the VPP signal. This signal
should not be connected to G24-L.
Using the SIM detection signal (SIM_PD_N) is mandatory in case that the SIM card is
accessible to the user, and may be removed during G24-L operation. To avoid damage to the
SIM or G24-L, the SIM interface signals must be deactivated before the SIM card is
mechanically removed from the SIM tray contacts. Therefore, the SIM_PD_N detection
signal must be disabled before the SIM is removed from the tray.
G24-L Module Hardware Description
25
Audio Interface
Audio Interface
The G24-L audio interface supports several audio devices and operating modes.
The audio interface's operating modes, active devices, amplification levels and speech processing
algorithms are fully controlled by the host application, through advanced programming options
and a versatile AT commands set.
The G24-L supports the following audio devices:
• Two single-ended and biased mono analog microphone inputs for use in a variety of modes.
• Two differential mono analog speaker outputs for use in a variety of modes.
• A digital serial interface using PCM coding.
Figure 2-14 shows the audio interface topology.
Figure 2-14: Audio Interface Topology
Handset Microphone Port
The handset microphone port is the G24-L power-up default active audio input for voice calls. It
is located on pin 61 at the G24-L interface connector, named MIC.
It is designed as a single-ended input and should be referenced to the G24-L analog ground.
The microphone input includes all the necessary circuitry to support a direct connection to an
external microphone device. It incorporates an internal bias voltage of 2.0V through a 2.0kΩ
resistor, and has an impedance of 1kΩ.
26
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Figure 2-15 shows the microphone circuit and Table 2-6 gives the microphone specifications.
Figure 2-15: Handset Microphone Circuit
Important:
The microphone circuit design depends on the type of microphone device.
A series capacitor is required in case a passive microphone is used, or the
application provides a separate bias voltage to an active microphone circuit.The
internal G24-L biasing circuit may also be used with an active microphone, which
corresponds to the microphone port specifications.
Table 2-6: Handset Microphone Port Specifications
Parameter
Conditions
Min
Typ
Max
Unit
2.0
Vpp
31
dB
Input Voltage
No load
Gain
Programmable by
+MMICG
AC Input
Impedance
Freq=1Khz
1
kΩ
Bias voltage
RBIAS = 2.0 kΩ
IBIAS < 1 mA
2.0
V
0
Bias Current
1
mA
Headset Microphone Port
The headset microphone port is designed for use with, but not limited to, a headset audio device.
It is located at pin 57 on the G24-L interface connector, named HDST_MIC.
It is designed as a single-ended input and should be referenced to the G24-L analog ground.
The microphone input includes all the necessary circuitry to support a direct connection to a
headset microphone device. It incorporates an internal bias voltage of 2.0V through a 2.0kΩ
resistor, and has an impedance of 1kΩ.
November 15, 2008
G24-L Module Hardware Description
27
Audio Interface
Figure 2-16 shows the microphone circuit and Table 2-7 gives the microphone specifications.
Figure 2-16: Headset Microphone Circuit
Important:
The headset microphone circuit design depends on the type of microphone device.
A series capacitor is required in case a passive microphone is used, or the
application provides a separate bias voltage to an active microphone circuit.
The internal G24-L biasing circuit may also be used with an active microphone,
which corresponds to the headset microphone port specifications.
Table 2-7: Headset Microphone Port Specifications
Parameter
Conditions
Min
Typ
Max
Unit
2.0
Vpp
31
dB
Input Voltage
No load
Gain
Programmable by
+MMICG
AC Input
Impedance
Freq=1Khz
1
kΩ
Bias voltage
RBIAS = 2.0 kΩ
IBIAS < 1 mA
2.0
V
0
Bias Current
1
mA
Speaker Port
The analog speaker port is the G24-L power-up default active output for voice calls and DTMF
tones. It is located at pins 67 and 69 on the G24-L interface connector, named SPKR_N and
SPKR_P respectively.
It is designed as a differential output with 32Ω impedance, but may also be used as a single-ended
output referenced to the G24-L analog ground.
The speaker output is used for both the handset and the headset audio paths.
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G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Figure 2-17 shows a differential speaker circuit, Figure 2-18 shows a single-ended speaker circuit
and Table 2-8 gives the speaker specifications.
Figure 2-17: Differential Speaker Circuit
Important:
For safety regulations it is important to place series resistors on the speaker output
lines, as illustrated in Figure 2-17. The resistors value should be R = 0Ω at the
design stage, but may be changed to a different value during audio safety testing, in
case speaker level limitation is required.
Figure 2-18: Single-ended Speaker Circuit
November 15, 2008
G24-L Module Hardware Description
29
Audio Interface
Important:
When implementing a single ended speaker design, it is required to place a series
capacitor and resistor on the speaker output line, as illustrated in Figure 2-18.
The capacitor should be of low tolerance with values of C = 10-22 uF.
The resistor value depends on the speaker application:
- For a handset device, the resistor value should be R = 0Ω at the design stage, but
may be changed to a different value during audio safety testing, in case speaker
level limitation is required.
- For a headset device, safety regulations require the resistors value to be R > 2RLΩ,
where RL is the speaker impedance (e.g. 32Ω).
For example, when using a 32Ω speaker the series resistance would be R > 64Ω.
Table 2-8: Speaker Port Specifications
Parameter
Conditions
Output
Voltage
No load
Gain
Programmable by
+CLVL
Min
Typ
0
Max
Unit
2.5
Vpp
21
dB
AC Output
Impedance
32
Ω
DC Voltage
1.4
V
THD
32 Ω load 200 Hz
- 20 kHz
0.1
%
Headset Detection
The G24-L operates by default in the basic audio mode with the handset audio path, for DTMF
tones and speech, and the alert loudspeaker device, for rings and alert tones, active.
The headset path is an alternate audio path in basic mode. It is designed for, but not limited to, a
personal hands-free audio device, a headset, using the headset microphone input device and the
speaker output device. When this path is selected, the alert loudspeaker is disabled, and all the
audio sounds are passed through to the headset path.
The HDST_INT_N signal is used to switch between handset and headset audio paths in basic
audio mode. This signal is set high by default at power up. Asserting the HDST_INT_N signal
low enables the headset audio path and disables the handset and alert paths. Setting this signal
high will disable the headset path and enable the handset and alert audio paths.
The G24-L supports dynamic switching between the handset and headset audio paths, during
operation and call handling.
Important:
30
The HDST_INT_N signal does not operate in advanced audio mode. This signal's
functionality is overridden by the AT+MAPATH command settings.
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Alert Loudspeaker Port
The alert loudspeaker is the default G24-L power-up ringer. It is used for, but not limited to,
sounding the G24-L alerts, melodies, and rings. It is located at pins 63 and 65 on the G24-L
interface connector, named ALRT_N and ALRT_P respectively.
It is designed with an internal amplifier supplied directly from VCC, which supplies 0.5W to the
audio device. It may also be used as a single-ended output referenced to the G24-L analog
ground.
Figure 2-19 shows the alert loudspeaker circuit and Table 2-9 gives the loudspeaker
specifications.
Figure 2-19: Differential Loudspeaker Circuit
Important:
For safety regulations it is important to place series resistors on the alert output
lines, as illustrated in Figure 2-19. The resistors value should be R = 0Ω at the
design stage, but may be changed to a different value during audio safety testing, in
case that alert level limitation is required.
Figure 2-20: SIngle-ended Loudspeaker Circuit
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G24-L Module Hardware Description
31
Audio Interface
Important:
When implementing a single ended loudspeaker design, it is required to place a
series capacitor and resistor on the alert output line, as illustrated in Figure 2-20.
The capacitor should be of low tolerance with values of C = 10-22 uF.
The resistor value should be R = 0Ω at the design stage, but may be changed to a
different value during audio safety testing, in case that alert level limitation is
required.
Table 2-9: Alert Port Specifications
Parameter
Conditions
Output Voltage
No load
Gain
Programmable by
+CRSL
Min
Typ
0
Max
Unit
3.0
Vpp
21
dB
AC Output
Impedance
8
Ω
DC Voltage
VCC/
2
V
THD
8 Ω load
5
%
Digital Audio Interface
The G24-L digital audio interface is a serial Pulse Code Modulation (PCM) bus, which uses
linear 2's compliment coding. G24-L is the PCM bus master, supplying the clock and sync signals
to the application.
The G24-L digital interface is a 4 signal PCM bus, which includes a bit clock output signal for the
bus timing, a frame sync output signal for audio sampling timing, and serial data input and output
signals.
The PCM bus signal's configuration is:
• PCM_CLK - 520 kHz serial clock
• PCM_FS - 8 kHz bit-wide frame-sync
• PCM_DOUT - 13-bit linear audio data output
• PCM_DIN - 13-bit linear audio data input
The analog audio is sampled at an 8 kHz rate and converted to linear 13-bit serial PCM audio
data. The serial data is transferred on the PCM bus in 16-bit word format, which includes 13
sampled data bits, and 3 added zero value bits.
The 16-bit serial data is transferred in both directions after each sync signal's falling edge. The
sync signal pulse duration is one clock period, after which the serial data is transferred in both
directions for 16 consecutive clock periods.
Following the 16-bit data transfer, the serial input and output data signals inactivate until the next
sync pulse, which occurs every 125 µS (8 kHz). It is recommended the serial data signals will be
High-Z during the inactive period.
32
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Important:
In digital audio mode the input and output gains cannot be controlled by AT
commands.
Figure 2-21 illustrates the PCM bus format of the voiceband audio configuration.
Figure 2-21: Voiceband Mode PCM Bus Coding Format
Operating Modes
The G24-L audio interface includes 2 modes of operation. Each operating mode defines the audio
input and output devices to be used for each audio sound type and their programmable settings.
Basic Mode
Basic audio mode is the G24-L default power-up audio configuration. Several audio paths are
available in this mode, and their settings can be programmed through the AT command set.
Table 2-10 describes the available audio paths in Basic mode.
Table 2-10: Basic Mode Audio Paths
Audio Path
Input Signal
Description
Handset
MIC
SPKR_N, SPKR_P
Default audio path for speech and
DTMF tones.
Headset
HDST_MIC
SPKR_N, SPKR_P
Alternate path for headset device.
Enable by setting HDST_INT_N
interface signal low.
ALRT_N, ALRT_P
Default alert and ringer loudspeaker
output device.
PCM_DOUT
Enable digital path by
AT+MADIGITAL=1
Alert
Digital
November 15, 2008
Output Signal
PCM_DIN
G24-L Module Hardware Description
33
Audio Interface
Advanced Mode
Advanced audio mode utilizes G24's unique set of AT commands for advanced audio
programming. The expanded AT command set enables to define a specific audio path and setting,
which are not part of the default configuration, for each type of audio sound (speech, DTMF
tones, rings and alerts).
Unlike basic audio mode, which provides predefined audio paths, the advanced audio mode
provides full control over the G24-L audio interface and its parameters, and differentiates
between each type of audio sound.
Table 2-11 describes the advanced mode audio programming features. These features are only a
part of the complete advanced audio AT command set.
Table 2-11: Advanced Mode Commands
Command
Description
AT+MAPATH
Sets the input device for voice, and the output
devices for voice, DTMF tones, rings and
alerts.
AT+MAFEAT
Enables and disables the speech processing
algorithms - Echo suppression, noise suppression and sidetone.
AT+MAVOL
Sets the gain (amplification) level of the
selected analog output device.
AT+MMICG
Sets the gain (amplification) level of the
selected analog input device.
AT+MADIGITAL
Switches between analog and digital audio
paths.
Audio Programming Interface
The G24-L incorporates a unique audio programming interface, through AT commands, which
controls the following audio features:
• Audio Path - Defines the input and output devices for speech, DTMF tones, rings and alerts.
• Audio Gain - Defines the amplification (gain) level for input and output audio devices.
• Audio Algorithm - Defines the speech processing features for voice calls.
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G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Figure 2-22 describes the audio programming interface options, which are defined by AT
commands.
Figure 2-22: Audio Programming Interface
Audio Algorithms
The G24-L audio interface features advanced speech processing algorithms for echo suppression,
noise suppression and side-tone feedback
Enabling or disabling the algorithms can be configured separately for each audio path and
operating mode through the AT command interface.
The G24-L also supports full rate (FR), half rate (HR), enhanced full rate (EFR) and adaptive
multi-rate (AMR) speech coding algorithms, which are used by the GSM network. These
algorithms are configured and operated by the GSM network provider.
Table 2-12 gives the speech processing features.
Table 2-12: Speech Processing Features
Feature
AT Command
Basic
Default
Setting
Advanced
Echo Suppression
Noise Suppression
Sidetone
November 15, 2008
Description
ATS96
AT+MAFEAT
Disabled
Controls the echo and noise suppression.
ATS94
AT+MAFEAT
Enabled
Controls the sidetone.
G24-L Module Hardware Description
35
Audio Interface
Gain Control
The amplification (gain) level for each input and output device can be configured through AT
commands. Both basic and advanced audio modes provide AT commands to set the desired gain
levels for each audio path and audio sound type.
Table 2-13 gives the gain control features.
Table 2-13: Gain Control Features
Device
Default
Gain
Gain Command
Basic
Advanced
AT+MMICG
AT+MMICG
Microphone
Headset Microphone
Speaker
Alert Speaker
AT+CLVL
AT+MAVOL
AT+CRSL
Description
3
Sets input speech gain level.
3
Sets input speech gain level.
4
Sets voice and DTMF gain.
4
Sets rings and alerts gain.
Gain levels for the input and output devices, which correspond to the values set by the AT
commands, are described in Table 2-14 and Table 2-15.
Table 2-14: Speaker Port Gains for Speech
36
AT Command
Value
0dBm0 Gain
Level (dB)
0dBm0 Output
Level (mVRMS)
0
-36
12
1
-33
17.5
2
-30
25
3
-27
34.5
4
-24
50
5
-21
70
6
-18
100
7
-15
140
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
.
Table 2-15: Microphone and Headset Microphone Port Gains
AT Command
Value
0dBm0 Input
Level
(mVRMS)
Maximum Input
Level (mVRMS)
0
87
350
...
...
...
3
63
250
...
...
...
16
15
55
...
...
...
31
4
11
Audio Design
The audio quality delivered by G24-L is highly affected by the application audio design,
particularly when using the analog audio interface. Therefore, special care must be taken when
designing the G24-L audio interface. Improper design and implementation of the audio interface
will result in poor audio quality.
Poor audio quality is a result of electrical interferences, or noises, from circuits surrounding the
audio interface. There are several possible sources for the audio noise:
• Transients and losses on the power supply
• EMI from antenna radiations
• Digital logic switching noise
Most of the audio noise originates from the GSM transmit burst current surges (217 Hz TDMA
buzz), which appear on the main power supply lines and antenna, but also indirectly penetrate the
internal application's supplies and signals. The noises are transferred into the G24's audio circuits
through the microphone input signals and then are amplified by the G24's internal audio
amplifiers.
To minimize the audio noise and improve the audio performance the microphone and speaker
signals must be designed with sufficient protection from surrounding noises.
The following guidelines should be followed to achieve best audio performance:
• Reference the microphone input circuits to the G24-L AGND interface signal.
• If using single-ended audio outputs, they should be referenced to the G24-L AGND interface
signal.
• Keep the audio circuits away from the antenna.
•
•
•
•
November 15, 2008
Use RF filtering capacitors on the audio signals, as described in Table 2-3.
The audio signals should not be routed adjacent to digital signals.
Isolate the audio signals by a surrounding ground plane or shields.
Filter internal supplies and signals that may indirectly affect the audio circuits, from noises
and voltage drops.
G24-L Module Hardware Description
37
Audio Interface
Analog Ground
The G24-L interface incorporates a dedicated analog ground contact, AGND pin 59, which is
internally connected to the G24's ground. The AGND signal is intended to provide a separate
ground connection for the application's external audio devices and circuits.
This signal provides an isolated ground connection directly from G24-L, which is separated from
the noisy digital ground of the application. It is recommended to connect this signal to analog
audio devices and circuits used by the application. Using a separate analog ground minimizes
audio noises and improves the audio circuit's immunity from external interferences.
38
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
A/D Interface
The G24-L includes 4 Analog to Digital Converter (ADC) signals with 8-bit resolution, for
environmental and electrical measurements. The ADC signals measure an analog DC voltage
level on their inputs which is converted to a 8-bit digital value for further processing by G24-L or
the user application.
The A/D signals operation and reporting mechanism is defined by the AT+MMAD command.
Each A/D can be defined to provide several reports:
• A single measurement.
A single A/D measurement will take place and will be reported upon activation of the AT
command.
• An automatic periodical measurement.
The A/D measures its input signal at a rate that is defined by the user application. Every
measurement will generate an unsolicited message over the serial interface.
• An automatic periodical measurement with predefined limits.
The A/D measures its input signal at a rate that is defined by the user. The user also defines
upper and/or lower limits for the A/D measurements. Each measurement is compared to
these limits, and an unsolicited message is generated only if these limits are exceeded.
Important:
In case the defined periodical measurement rate is equal to, or shorter than, the
defined sleep mode delay settings (ATS24), G24-L will not enter low power mode.
Table 2-16 below, lists the internal and external A/D signals provided by G24-L.
Table 2-16: A/D Signals
ADC Name
Description
Pin #
ADC
#
Min
Max
Unit
VCC
Power Supply A/D
-
5
3.0
4.5
V
ADC3
GPAD 3
47
3
0
2.66
V
ADC2
GPAD 2
43
2
0
2.66
V
ADC1
GPAD 1
37
1
0
2.66
V
General Purpose A/D
The G24-L provides 3 general purpose A/D (GPAD) signals for customer application use. Each
A/D signal can monitor a separate external voltage and report its measured level independently to
the application, through the AT command interface.
The GPAD signals measure a DC voltage level of 0 - 2.66 V, which is converted internally to a
8-bit digital value. The user application can monitor the A/D voltage level through the
AT+MMAD command, which returns the measured DC level in Volts times 100.
For example, a measured analog DC level of 1.75 Volts will be presented as 175 by the MMAD
command.
November 15, 2008
G24-L Module Hardware Description
39
A/D Interface
Important:
In the G24-LC Charger Model configuration, the ADC3 signal is allocated to a
battery temperature measurement sensor and is not intended for general use.
Table 2-17 gives the GPAD specifications.
Table 2-17: GPAD Specifications
Parameter
Conditions
Maximum
Input Voltage
Operating range
Measurement
Voltage
ADC range
Min
Max
Unit
-0.1
2.75
V
0
2.66
V
Resolution
Typ
10
mV
Power Supply A/D
The main power supply (VCC) is constantly monitored internally by the G24-L through a
dedicated A/D signal, which is not accessible on the interface connector.
The measured VCC level can be read and monitored through the AT+MMAD command, which
returns the measured VCC level in Volts times 100.
For example, a measured supply level of 3.65 Volts will be presented as 365 by the MMAD
command.
Important:
During GSM transmissions the power supply may suffer voltage drops. This can
cause frequent and wide changes in the power supply A/D measurements. This
should be taken into account when reading and operating the G24-L power supply
A/D.
Table 2-18: Supply A/D Specifications
Parameter
Sampling
Range
Conditions
Operating range
Min
Typ
3.0
Resolution
10
Max
Unit
4.5
V
mV
Battery Temperature A/D
In the G24-LC Battery Charging Model the ADC3 signal is allocated specifically to the battery
temperature measurement, which is required during the charging process.
40
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
This function is described in detail in “Battery Charger Interface” on page 47.
Table 2-19: Temperature A/D Specifications
Parameter
Temperature
Range
Conditions
Operating range
Min
Typ
0
Tolerance
Resolution
November 15, 2008
G24-L Module Hardware Description
5
Max
Unit
+45
°C
5
%
°C
41
Controls and Indicators Interface
Controls and Indicators Interface
The G24-L incorporates several interface signals for controlling and monitoring the module's
operation. The following paragraphs describes these signals and their operation.
Table 2-20 gives a description of the controls and indicators signals.
Table 2-20: Controls and Indicators
Connector Pin
Signal Name
Description
25
RESET_N
G24-L system reset output indicator.
When high, G24-L is operating.
27
VREF
2.80V regulated output.
Supplies external circuits up to
150mA.
26
WKUPO_N
Host application wake-up signal indicator.
41
ANT_DET
Antenna physical connection detect
indicator.
49
GPRS/GSM
Network status indicator.
39
TXEN_N
Transmission burst indication.
28, 30, 32, 34, 36,
38, 40, 42
GPIO 1-8
General purpose IO signals for customer use.
Reset
The RESET_N output signal indicates the G24's operating status. This signal is set high after
power up, when G24-L is operating. It is set low when G24-L is powered off.
When the RESET_N signal is low, the G24-L interface signals are disabled and do not represent
any valid data or state. Furthermore, any input signals connected to the G24-L interface must be
disabled (tri-state) or set low when RESET_N is low.
Important:
During SW programming, the RESET_N signal state is not valid and may be set
low or toggled by the module.
VREF Reference Regulator
The G24-L incorporates a regulated voltage output, VREF. The regulator provides a 2.8V output
for use by the customer application. This regulator can source up to 150 mA of current to power
any external digital circuits.
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G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Important:
The VREF regulator is powered from the G24's main power supply, and therefore
any current sourced through this regulator originates from the G24-L VCC supply.
The overall VCC current consumed by G24-L is directly affected by the VREF
operation. The G24-L current consumption rises with respect to the current sourced
through VREF.
Figure 2-23 shows the VREF power-up timing.
Figure 2-23: VREF Power-up Timing
Table 2-21 gives the VREF specifications.
Table 2-21: VREF Specifications
Parameter
VOUT
Conditions
IOUT < 150 mA
Min
Typ
Max
Unit
-1%
2.8
+1%
V
150
mA
IOUT
Load regulation
12
Line regulation
PSRR
mV
0.2
20 Hz - 20 kHz
65
%/V
dB
Wakeup Out
Some applications incorporate their own power saving mode, in which they operate with minimal
functionality, including disabling of interfaces and serial communications.
The wakeup-out (WKUPO_N) signal is an active low output, which is designed to support a low
power mode feature in the host application. This signal is used by G24-L to indicate that it
requires to communicate with the host application through the serial interface, due to an incoming
call or data, or an unsolicited event. Applications that incorporate a low power mode should use
November 15, 2008
G24-L Module Hardware Description
43
Controls and Indicators Interface
this signal as an indication to switch from low power mode to normal operation, and activate the
serial interface.
The wakeup-out mechanism, using the WKUPO_N signal, is controlled by 2 AT commands (see
Figure 2-24):
• ATS102 - Defines the delay time in milliseconds that G24-L will wait, after asserting the
WKUPO_N signal low, before sending data on the serial interface. This delay is required to
allow the application enough time to reactivate from low power mode and switch to normal
mode.
If ATS102=0, which is the default value, the WKUPO_N signal and mechanism is disabled.
In case the serial interface incorporates hardware flow control signals, the data will be sent
according to their state, after the ATS102 delay time has expired.
• ATS100 - Defines the application minimal wakeup duration, in seconds, for a single wakeup
event. This time definition is required to avoid frequent unnecessary wakeup events and
consequent ATS102 delays.
The application may return to low power mode after the serial interface has been inactive for
the duration set by ATS100. This duration is measured from the last data sent or received on
the serial interface.
Figure 2-24: WKUPO_N Operation
The following guidelines apply to the wakeup-out mechanism:
• G24-L will set the WKUPO_N signal low to indicate that in has data to send through the
serial interface.
• G24-L will start sending the data to the application after the delay defined by ATS102.
• The WKUPO_N signal will remain low while data is being sent to the host application.
• The host application should keep its serial interface active, and not switch to low power
mode, while the WKUPO_N signal is low.
• G24-L will set the WKUPO_N signal high when it has completed sending the data.
• The application serial interface must stay active, and not switch to low power mode, for the
duration set by ATS100, after WKUPO_N is set high.
• G24-L will not set the WKUPO_N signal low if it needs to send additional data during the
ATS100 delay time.
• The application may switch to low power mode after the WKUPO_N signal is set high and
the serial interface has been inactive for the duration set by ATS100.
44
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Antenna Detection
The G24-L incorporates an internal antenna detection circuit, which senses the physical
connection and removal of an antenna or antenna circuit on the G24-L antenna connector. The
antenna detection state is reported to the application through the ANT_DET output signal, and
may also be queried by the ATS97 command.
The detection circuit senses DC resistance to ground on the G24-L antenna connector.
A DC resistance below 100kohm (+10%) is defined as a valid antenna connection, and the
ANT_DET output signal is set high.
GPRS Detection
The GPRS output signal indicates the network GPRS connection status. When G24-L is
connected to a GPRS network, this signal is enabled. When G24-L is not connected to the GPRS
network this signal is disabled.
Transmission Indicator
The TXEN_N output signal indicates when G24-L is transmitting over the GSM network. This
signal follows the G24-L GSM transmit bursts. This signal is set low during transmission burst,
and set high when no transmission is in progress.
Figure 2-25 shows the TXEN_N operation.
Figure 2-25: TXEN_N Operation
General Purpose I/O
The G24-L incorporates 8 general purpose IO signals for the user application. Each GPIO signal
may be configured and controlled by AT command. These signals may be used to control or set
external application circuits, or to receive indications from the external application.
November 15, 2008
G24-L Module Hardware Description
45
Antenna Interface
Antenna Interface
The G24-L antenna connector is the RF interface to the GSM network.
The antenna interface is terminated by an MMCX connector type, which is 50Ω impedance
matched at the relevant GSM frequencies.
The antenna or antenna application must be installed properly to achieve best performance.
Table 2-22 gives the antenna interface specifications.
Table 2-22: Antenna Interface Specifications
Parameter
GSM 850
GSM 900
DCS 1800
PCS 1900
46
Conditions
Specifications
TX
824 - 849 MHz
RX
869 - 893 MHz
TX
880 - 915 MHz
RX
925 - 960 MHz
TX
1710 - 1785 MHz
RX
1805 - 1880 MHz
TX
1850 - 1910 MHz
RX
1930 - 1990 MHz
Gain
0 dBi (unity) gain or greater
Impedance
50Ω
VSWR
Less than: 2.5:1
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Battery Charger Interface
General
G24-LC incorporates a charging circuit to support battery operated applications.
The battery charger interface includes all the necessary circuitry and signals to facilitate operation
and charging of a single cell 3.7V Lithium-Ion battery pack, including safety and temperature
controls. The battery charger interface is designed for a direct and seamless connection to the
battery pack and external charger.
The G24-LC battery charger interface is managed and controlled automatically by the internal
G24-LC charging management application. The management application is responsible for
executing the battery charging algorithm and controlling the battery charging process without
external user intervention.
Battery Connectivity
The battery is connected to the G24-LC module through the 70-pin interface connector in the
same manner as when using any external DC regulated supply. The battery positive (+) and
negative (-) supply contacts are connected to the module's VCC and GND contacts, respectively,
and the battery internal thermistor is connected to the module's ADC3 contact. The battery pack
is required to include an internal thermistor for temperature control, Murata PN
NTH5G10P39A103J08TH, or equivalent. The module will not operate in case the ADC3 signal
is not connected to a valid thermistor.
Important:
In the G24-LC model, the ADC3 signal is used specifically for the battery
thermistor measurement, and is not used for general purpose. ADC3 provides a
current source for the thermistor load measurement during charging operation.
ADC3 must be used with a battery thermistor for proper operation.
Charger Connectivity
The external charger is connected to the G24-LC module through the 70-pin interface connector.
The charger provides the necessary external current source to charge the battery when required.
The charger must provide a stable DC voltage and current at the specified levels.
The charger positive (+) supply contact is connected to the module's VBUS and IGN contacts.
VBUS and IGN are connected internally in the module charging circuit. The charger negative (-)
contact is connected to the module's GND contacts.
Important:
November 15, 2008
In the G24-LC model, the Ignition (IGN) signal is used for the external charger
supply together with VBUS, and is not used for turning-on the module. Both VBUS
and IGN must be connected to the external charger for proper operation.
G24-L Module Hardware Description
47
Battery Charger Interface
The battery and charger interface signals are described in the table below:
Table 2-23: Battery and Charger Interface Signals
Pin #
Signal Name
Description
1-4
GND
Module Ground
Connect to battery BATT(-) contact.
5-8
VCC
Module Supply
Connect to battery BATT(+) contact.
10
VBUS
51
IGN
External charger input
VBUS and IGN signals are connected
internally in the G24-LC.
47
ADC3
Battery temperature measurement.
Connect to thermistor at battery
THERM contact.
The battery charger connectivity is depicted in Figure 2-26.
Figure 2-26: Battery and Charger Interface Connectivity
48
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
The following table describes the battery charger specifications.
Table 2-24: Charger Supply Specifications
Parameter
Conditions
Supply Voltage
Supply Current
Maximum
Pre-Charge
Operating
Temperature
Battery Thermistor
Min
Typ
Max
Unit
4.5
5.0
5.25
V
500
150
mA
45
°C
0
Battery Charging Process
The battery charging process is managed automatically by the G24-LC, as described below.
The charging process is enabled when an external 5V DC supply is connected to the G24-LC
interface, at the VBUS and IGN contacts, while a valid battery is used and properly connected.
Depending on the battery capacity conditions, the charging process will commence in one of the
following states.
Under Voltage
Under Voltage state is defined as battery voltage below the module's minimum operating level. At
this stage, the module can't be turned-on. The battery must be charged until it reaches the
minimum operating voltage level.
The charger supplies a constant current of 150 mA into the battery until the module can be
turned-on.
Pre-Charging
Pre-Charge is defined as a low current charging state, when the battery voltage level is over the
minimum operating level, but still considered low. At this stage the module can be turned-on and
operated.
The charger supplies a constant current of 150 mA into the battery, until a stable voltage level of
3.6V is reached.
Charging (Continuos Current)
In this stage the battery capacity is at a sufficient level to allow safe and steady operation of the
module and the charging process. The charging is performed in 3 stages, from maximum current
down to low current, until the battery reaches its maximum capacity. Each stage provides a
different charging current continuously to the battery, based on the battery level.
November 15, 2008
G24-L Module Hardware Description
49
Battery Charger Interface
Monitoring (Full)
When the battery is fully charged and reaches above 4.20V, the charging process is stopped. The
battery charging circuit is deactivates the charging path and current from the external charger is
not required.
At this stage the battery voltage is monitored continuously by the G24-LC as it discharges. While
the battery discharges, charging may be performed in a discontinuous mode, in which the
charging circuit activates and deactivates periodically, providing low current, as required to keep
the battery fully charged.
In case the battery voltage drops below the monitoring state level, the charging process will
switch back to the charging state and provide the required current.
Figure 2-27 below depicts the charging process.
CC State
4.20V
Charging 1st Stage
3.60V
nd
Pre-Charge
2
Stage
3.30V
Under Voltage
t
rd
3 Stage
Full stage
Full Current
(500mA)
250mA
150mA
120mA
25mA
Figure 2-27: Battery Charging Process
50
G24-L Module Hardware Description
November 15, 2008
Chapter 2: Hardware Interface Description
Protection and Safety
The G24-LC battery Charger Interface is designed and tested according to the EN60950 safety
regulation together with the recommended accessories, which are described in the table below.
Table 2-25: Recommended Accessories for G24-LC
Accessory
Description
Manufacturer
Part Number
Battery
3.7V Li-Ion 850mAh
Motorola
SNN5804A
Charger
5V, 550mA
Motorola
SPN5189A
Charger
5V, 850mA
Motorola
SPN5202C
In addition, the charging circuit incorporates protective elements that will halt the charging
process in case an error is detected. If any of the following faults occur, the charging process will
be stopped until the fault condition is corrected:
• Battery voltage limits exceeded
• Charger Supply voltage limits exceeded
• Charger Supply current limits exceeded
• Battery temperature limits exceeded
November 15, 2008
G24-L Module Hardware Description
51
Battery Charger Interface
52
G24-L Module Hardware Description
November 15, 2008
Chapter 3: Electrical and Environmental Specifications
Absolute Maximum Ratings
Table 3-1 gives the maximum electrical characteristics of the G24-L interface signals.
Caution:
Exceeding the values may result in permanent damage to the module.
Table 3-1: Maximum Ratings
Parameter
Conditions
VCC Supply
November 15, 2008
Min
Max
Unit
0
4.5
V
Digital Input Signals
(Except for IGN,
VBUS, USB_DP,
USB_DN)
G24-L powered on 0
3
V
Analog Input Signals
(Audio, A/D interfaces)
G24-L powered on 0
2.75
V
All Input Signals
(Except for IGN,
VBUS, USB_DP,
USB_DN)
G24-L powered
off
0
0.2
V
IGN signal
0
16
V
VBUS signal
0
5.5
V
USB_DP, USB_DN
0
5
V
G24-L Module Hardware Description
53
Environmental Specifications
Environmental Specifications
Table 3-2 gives the environmental operating conditions of the G24-L module.
Caution:
Exceeding the values may result in permanent damage to the module.
Table 3-2: Environmental Ratings
Parameter
Min
Max
Unit
Standard Operating
Temperature
-20
+75
°C
Storage Temperature
-40
+85
°C
ESD
Conditions
At antenna connector
Air
Contact
At interface connector
KV
± 15
±6
±1
Application Interface Specifications
Table 3-3 summarizes the DC electrical specifications of the application interface connector
signals.
54
Important:
Interface signals that are not used by the customer application must be left
unconnected. G24-L incorporates the necessary internal circuitry to keep
unconnected signal in their default state. Do not connect any components to, or
apply any voltage on, signals that are not used by the application.
Important:
Signals that are defined as "Do Not Use", or DNU, must remain externally
unconnected in any case. These signals are reserved for future use.
G24-L Module Hardware Description
November 15, 2008
Chapter 3: Electrical and Environmental Specifications
Table 3-3: Interface Specifications
Level
Signal
Name
Pin #
Active Internal
H/L
PU/PD Parameter Conditions
Description I/O
Min
Typ
Max Units
3.3
3.6
4.2
V
2
A
65
µA
2.8
+1%
V
2.8
3.0
V
0
0.4
Power:
1
2
GND
Ground
3
4
VIN
5
6
VCC
7
DC power
supply
I
IMAX
VCC = 3.6 V
IOFF
8
Control:
27
VREF
Reference
regulator output
O
16
WKUPI_N
G24-L
wakeup input
I
WKUPO_
N
Host wakeup
output
O
RESET_N
Reset signal
output
O
26
25
VOUT
L
100K
PU
L
L
IOUT< 150 mA -1%
2
VIH
VIL
VOH
VOL
IOUT < 4 mA
VOH
VOL
IOUT < 4 mA
2.6
0
2.6
ON_N
On/Off switch I
L
100K
PU
VIH
VIL
0.7
VCC
51
IGN
Ignition input
H
15K PD
VIH
VIL
2.0
39
41
49
TXEN_N
ANT_DET
GPRS
Transmit indicator
O
Antenna presence indicator
O
GPRS coverage indicator
O
November 15, 2008
L
H
L
100K
PU
VOH
VOL
IOUT < 2.2 uA
VOH
VOL
IOUT < 4 mA
VOH
VOL
IOUT < 4 mA
2.6
VCC
G24-L Module Hardware Description
V
16
V
0.1
2.8
V
0.3
2.8
0
V
0.4
2.8
0
2.6
V
0.3
VCC
0
2.6
V
0.3
2.8
0
53
I
2.8
V
0.3
55
Application Interface Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
H/L
PU/PD Parameter Conditions
Description I/O
Min
Typ
Max Units
2.0
2.8
3.0
0
0.3
UART:
21
TXD_N
UART1 TXD
I
L
11
RXD_N
UART1 RXD
O
L
9
RTS_N
UART1 RTS
I
L
15
CTS_N
UART1 CTS
O
L
19
DTR_N
UART1 DTR
I
L
13
DSR_N
UART1 DSR
O
L
17
DCD_N
UART1 DCD
O
L
23
RI_N
UART1 RI
O
L
USB_VBUS
USB bus
power
I
H
100K
PU
VIH
100K
PU
100K
PU
VIL
VOH
IOUT < 4 mA
2.6
VOL
V
2.8
0
0.3
5.0
5.25
USB:
10
VIH
4.5
V
VIL
12
14
USB_DP
USB_DN
USB bus
serial data
I/O
USB bus
serial data
I/O
SIM presence
detect
I
H
VIH
VIL
L
3.0
NOTE 1
VOH
VOL
3.0
VIH
VIL
2.0
VOH
2.7
1.65
0
0.2
3.3
3.6
0
0.8
V
3.3
0
0.3
SIM Card:
50
SIM_PD_N
L
48
SIM_VCC
SIM supply
O
H
44
SIM_RST_
N
SIM reset
O
L
52
SIM_DIO
SIM serial
data
I/O
H
46
SIM_CLK
SIM clock
O
H
56
100K
PU
VOH
NOTE 2
5.1K PU
VOL
G24-L Module Hardware Description
2.8
3.0
0
0.3
2.85
1.8
2.95
1.95
SIM_
VCC
0
V
V
V
0.4
November 15, 2008
Chapter 3: Electrical and Environmental Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
H/L
PU/PD Parameter Conditions
Description I/O
Min
Typ
Max Units
2.0
2.8
3.0
0
0.3
Digital Audio:
18
PCM_
DIN
Digital audio
receive
I
H
20
PCM_
DOUT
Digital audio
transmit
O
H
VIL
22
PCM_CLK
Digital audio
clock
O
H
VOH
24
PCM_FS
Digital audio
frame sync.
O
H
VOL
November 15, 2008
100K
PU
VIH
IOUT < 4 mA
G24-L Module Hardware Description
2.6
V
2.8
0
0.3
57
Application Interface Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
H/L
PU/PD Parameter Conditions
Description I/O
Min
Typ
Max Units
2.4
2.8
3.0
0
0.15
GPIO:
28
GPIO1
General purpose I/O
I/O
22K PU
30
GPIO2
General purpose I/O
I/O
22K PU
32
GPIO3
General purpose I/O
I/O
22K PU
34
GPIO4
General purpose I/O
I/O
22K PU
36
GPIO5
General purpose I/O
I/O
22K PU
38
GPIO6
General purpose I/O
I/O
22K PU
VIH
VIL
V
2.0
VOH
IOUT < 150 uA
2.8
0
0.3
VOL
40
GPIO7
General purpose I/O
I/O
22K PU
42
GPIO8
General purpose I/O
I/O
22K PU
67
SPKR_N
Speaker
inverted Hands free
O
RL
69
SPKR_P
Speaker Hands free
O
VACPP
63
ALRT_N
Alert speaker
inverted
O
RL
65
ALRT_P
Alert speaker
O
VACPP
61
MIC
Microphone
input
I
RIN
Audio:
32
2.75
Single ended,
no load
8
Single ended,
no load
AGND
Audio ground
57
HDST_
MIC
Headset
microphone
input
I
10K
Headset
detect interrupt
I
55
58
HDST_
INT_N
10K
L
100K
PU
VIH
VIL
G24-L Module Hardware Description
2.0
V
Ω
2.5
VPP
V
Ω
2.5
RIN
V
Ω
2.75
VACPP
59
Ω
2.8
3.0
0
0.3
V
V
November 15, 2008
Chapter 3: Electrical and Environmental Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
H/L
PU/PD Parameter Conditions
Description I/O
Min
Typ
Max Units
A/D:
37
ADC1
General purpose A/D
I
VIN
Maximum
Input Level
0
2.75
V
43
ADC2
General purpose A/D
I
VIN-ACTIVE
Active sampling range
0
2.66
V
47
ADC3/
Thermistor
General purpose A/D/
Battery Temperature
I
IADC
3
mV
Not Used:
29
Do Not Use
31
Do Not Use
33
Do Not Use
35
Do Not Use
45
Do Not Use
54
Do Not Use
60
Do Not Use
56
Do Not Use
58
Do Not Use
70
Do Not Use
62
Do Not Use
64
Do Not Use
68
Do Not Use
66
Do Not Use
Note 1:Per USB Specifications Rev 1.1.
Note 2:Per ISO 7816-3 IC specifications.
November 15, 2008
G24-L Module Hardware Description
59
Application Interface Specifications
60
G24-L Module Hardware Description
November 15, 2008
Chapter 4: Mechanical Specifications
Board Dimensions
Figure 4-1 describes the G24-L mechanical characteristics.
Figure 4-1: G24-L Mechanical Characteristics
November 15, 2008
G24-L Module Hardware Description
61
Interface Connector Specifications
Interface Connector Specifications
The G24-L uses a single 70-pin, 0.5 mm pitch, board to board connector for the application
interface, which is available in 2 stacking height versions, as described in Table 4-1.
Table 4-1: G24-L interface connector options
G24-L Connector
Mating Connector
Molex 53748-0708
Molex 52991-0708
Stacking Height
3.0 mm
Figure 4-2 shows the G24-L interface connector.
Figure 4-2: G24-L Interface Connector
Table 4-2 describes the G24-L interface connector characteristics.
Table 4-2: Interface Connector Specifications
62
Parameter
53748 (3.0 mm)
Contacts
70
Rows
2
Pitch
0.5 mm
Maximum Current
500 mA
Maximum Voltage
50 V
Contact Resistance
50 mΩ maximum
Insulation
Resistance
100 MΩ minimum
Durability
30 mating cycles
maximum
Stacking Height
3.0 mm
Mates with
Molex 52991-0708
G24-L Module Hardware Description
November 15, 2008
Chapter 4: Mechanical Specifications
Mating Connector
The mating connector incorporate the same electrical and mechanical characteristics as the
corresponding G24-L interface connector, which is described in Table 4-2.
Figure 4-3 provides a reference drawing of the mating connector mechanical dimensions.
Figure 4-3: Mating Connector Dimensions
For more information on the G24-L mating connector, please refer to the Molex web site at
http://www.molex.com.
November 15, 2008
G24-L Module Hardware Description
63
RF Connector Specifications
RF Connector Specifications
The G24-L uses a standard MMCX receptacle connector for the radio interface. The
connector is manufactured by Amphenol, PN MMCX6251S5.
Figure 4-4 shows the MMCX connector dimensions.
Figure 4-4: MMCX Connector Dimensions
Table 4-3 describes the G24-L RF connector characteristics.
Table 4-3: RF Connector Specifications
Parameter
Specifications
Rated Voltage
335 VRMS
Impedance
50 Ω
Contact Resistance
5 mΩ center contact
2.5 mΩ outer contact
Insulation
Resistance
1000 MΩ
Insertion Force
3.4 lbs maximum
Withdrawal Force
4.5 lbs maximum
Contact Retaention
Force
4 lbs maximum
Durability
500 mated cycles maximum
Mating Connector
The RF mating connector should be a standard MMCX plug connector or cable
assembly, which corresponds to the G24-L MMCX connector specifications.
Any standard MMCX connector or application from different manufacturers may be
mated with G24-L.
64
G24-L Module Hardware Description
November 15, 2008
Chapter 4: Mechanical Specifications
Such a cable assembly example is the Huber-Suhner PN 11_MMCX-50-1-2/111_OH,
which is illustrated in Figure 4-5.
Figure 4-5: Optional MMCX Cable Assembly
November 15, 2008
G24-L Module Hardware Description
65
G24-L Mounting
G24-L Mounting
The G24-L incorporates 2 mechanical holes for installing the module onto the
application board. The holes are 2.4 millimeters in diameter, which accommodates
several types of mechanical elements.
Several mechanical approaches may be applied to mount and fasten G24-L to the
application board. Using M2 screws with suitable washers to mount the module onto
spacers, a bracket or chassis is a recommended design.
Special attention must be paid to the area surrounding the G24-L mounting holes. A
grounding pad of 4.4 milimeters in diameter surrounds these holes. The diameter and
area of this pad must not be exceeded by any mechanical or electrical element.
Several electrical components, which are not shielded, are located near the holes.
These components must not be in contact with the mounting elements or with other
parts of the application board, and care must be taken to avoid any damage.
Figure 4-6 depicts the G24-L mounting area.
Figure 4-6: G24-L Mounting Area
The holes are used for mechanical mounting of G24-L to the application board but
also for grounding support. Using conductive elements to install G24-L significantly
improves the overall grounding of the module and therefore improves the G24-L
performance and stability.
It is required to use screws or other mechanical elements to fasten G24-L to the
application board, but it is highly recommended to use conductive elements to
improve the module's performance.
66
G24-L Module Hardware Description
November 15, 2008
Chapter 5: Service and Testing
Service
This section provides contact information for any possible queries that may arise, for example:
• Have questions?
•
•
•
•
•
Having trouble getting the Developer Board set up?
Technical questions?
Configuration questions/problems?
Technical operating problems?
Need documentation?
Who to Contact?
The GSM/CDMA Data Module Customer Support Center is ready to assist you on
integration issues.
Direct Customer. Use this following email address to contact customer assistance:
[email protected]
Note: The support services provided by Motorola are subject to the agreement between the
customer and Motorola and may be at an additional charge to the customer. Motorola will
inform the customer in advance of any such charge.
Indirect Customer. Send requests to your distributor and not to Motorola help desk.
Required Query Information
Every new call/problem report, directly from a Direct Customer or from a distributor, should be
directed to the help desk email address noted above in “Who to Contact?” . It is recommended to
report each individual issue in a separate email. The following information is required when
reporting a problem:
• Customer name and address
• Customer contact information for this request, including:
– Name
– Telephone
– Fax number
– Mobile number
– Email address
• Product name (G24)
November 15, 2008
G24-L Module Hardware Description
67
Service
•
•
•
•
Software version of the unit (ATI8 command) or model number
PCB version (located on the PCB near the RF connector)
Severity of the problem
Problem description, including:
– Operator name
– Type of SIM card (for example, Test, Pre-paid, or 5v/3v/1.8v)
– Setup Configuration (such as Developer Board, handset, host, connections, and so on)
– Detailed scenario from startup
– Log of all the commands and the responses, beginning from startup
• Answers to the following questions:
– Was the same scenario tested on the Developer Board and the PC to reproduce the problem?
– How many units do you have, and how many of them have this problem?
– How often does the problem recur?
In addition to the information requested above, send the following AT commands and the
HyperTerminal log with the responses:
• AT+CMEE=2 // to get textual error message
•
•
•
•
•
•
•
AT+CPIN? // to get SIM card status
AT+CREG? // to see if the TXVR is registered to the network
AT+CSQ // to get the signal strength (RX level)
AT+CGSN // to read the IMEI number of the unit
ATI3 // to get the software version of the TXVR
AT\S // to get the setting of basic AT commands
AT+CMER=0,0,1,1 // to get messages and indicators from the handset display to the DTE
Motorola Workflow
The help desk uses the following workflow when responding to new calls:
1. Each new call is registered in the help desk data base.
2. The help desk immediately notifies the customer with the help desk system record number
for each issue.
3. A champion is assigned to be responsible for the new call, from arrival to closing.
4. During this time, the champion updates the help desk system with the progress of the
resolution process.
5. The champion is the contact to the customer and the engineering team, and coordinates
activities that are required to solve the problem.
68
G24-L Module Hardware Description
November 15, 2008
Chapter 5: Service and Testing
Service Centers
Motorola Electronics Taiwan PCS
11F, No, 296, Sec. 4, Jen-Ai Road
Taipei, 106, Taiwan, R.O.C
Motorola GmbH
Am Sophienhof 10
D-24941 Flensburg
Germany
Motorola Communications ISRAEL Ltd.
Service Operation
Attention: Shukrun Ofer
3 Krementski Street
Tel Aviv, Israel 67899
Telephone: (972) 3 5658829
JNB Electronics Pty Ltd.
347 Settlement Road, Thomastown
VIC 3074
Australia
Flextronics
Transportation group leader
Zalaegerszeg Industrial Park 1 PCC
Building 1 PCC Posta u. 63
H-8900 Zalaegerszeg
Hungary
BGH do Brasil Comunicações e Serviços Ltda.
Al Ceci, 534 - Galpão 3
Barueri - SP - Brazil
Tel: 54 11 4309 2046
FeiHongDaLi Telecommunications Technology Co.Ltd.,TianjinSHi
B-6F JuFu Yuan Building
XinKai Road, Hedong District,
Tianjin 300011
China
Field service should be coordinated with the Service Manager in Motorola using the following
email address: [email protected]
November 15, 2008
G24-L Module Hardware Description
69
Testing a Standalone Unit
Testing a Standalone Unit
This section describes how to perform a G24-L functionality test, whose purpose is to:
• Introduce the user to the G24-L
• Explain how to work with the G24-L unit
• Describe how to evaluate basic G24-L features
The test setup provides a wide platform through which a G24-L unit can be evaluated. The
specific test procedure described below covers only a few of the G24-L’s many features. Using
this setup, you can perform several additional tests on the G24-L.
The test is performed using two modems, one of which is the G24-L. The modems communicate
with each other through a single computer, which also controls their operation.
The test requires knowledge about the operation of the G24-L Developer’s Kit, terminal
applications and AT commands. Refer to relevant documentation for assistance.
To perform the test, you need the following:
• A G24-L OEM cellular engine unit
• A G24-L Developer's Kit
• A desktop or laptop computer, which includes:
– A free serial communications port (RS232)
– A connected and active line modem (internal or external)
– A terminal application (such as HyperTerminal)
Test Setup
To Setup the G24-L Test
Follow this procedure (Figure 5-1) to set up your equipment before performing the test:
1. Verify that the computer you intend to use for the test is equipped with a working
line modem
You can use a second G24-L unit instead of the line modem. When doing so, you must repeat
the setup procedure that follows for the additional G24-L.
2. Set up the G24-L and the Developer Board as described in “Initial Setup” in
“Chapter 2: Developer Board and Interfaces Description” in the “G24-L Developer’s Kit”
(Motorola part no. 6802984C10)
3. Verify that the G24-L has adequate reception from the local GSM network
4. Connect the Developer Board’s RS232 port to the computer’s serial port
5. Open a terminal application window (such as HyperTerminal) and configure it to operate
with the serial port occupied by the G24-L
70
G24-L Module Hardware Description
November 15, 2008
Chapter 5: Service and Testing
6. Open a second terminal window and configure it to operate with the serial port occupied by
the line modem
Computer
To telephone line
wall outlet
Line Modem
(internal or external)
Serial
Port
Serial
Port
Serial
Cable
Developer Board
with G24-L unit
RS232
Port
Figure 5-1: Test Setup
November 15, 2008
G24-L Module Hardware Description
71
Testing a Standalone Unit
Test Procedure
To Perform the G24-L Test
Follow the procedure below to perform the G24-L test:
1. Verify that the line modem is functioning and communicating with the computer by entering
the AT command at in the modem’s terminal window
This common AT command prompts a properly working modem to reply OK.
2. Verify that the G24-L is functioning and communicating with the computer by performing
the following AT commands in the G24-L terminal window:
• ati7 —prompts G24-L identification
The G24-L will reply G24-L OEM Module.
• ati8 —prompts the G24-L software version
3. Make a CSD call from the G24-L to the line modem or the reverse using the atd and ata
commands in the appropriate window
4. Verify that a connection between the two modems is established
5. Select any file to transfer between the two modems
The file can be any existing file, or a new file created specifically for the test.
6. Send the file either from the G24-L, or to the G24-L, through the terminal application using
the terminal application’s send/receive file options
7. When the file transfer is complete, use the ath command in any of the terminal windows to
terminate the call
This step completes the test. You can now continue to perform additional tests using the same
setup, or change the setup as required.
72
G24-L Module Hardware Description
November 15, 2008
Acronyms and Abbreviations
Abbreviation
Full Name
A
A AMR
Adaptive Multi Rate
A AOC
Advice of Charge
B BR
Baud Rate
B bps
Bits Per Second
C CSD
Circuit Switched Data
C CTS
Clear to Send
D DCD
Data Carrier Detect
D DCE
Data Communication Equipment (such as modems)
D DCS
Digital Cellular System (GSM in the 1800MHz band)
D DOC
Department of Communications (Canada)
D DRX
Discontinuos Reception
D DSP
Digital Signal Processor
D DSR
Data Set Ready
D DTE
Data Terminal Equipment (such as terminals, PCs and so on)
D DTMF
Dual Tone MultiFrequency
D DTR
Data Terminal Ready
D DTX
Discontinuos Transmission
E EFR
Enhanced Full Rate
E EGPRS
Enhanced General Packet Radio Service
E EGSM
Extended Global System for Mobile Communications
E EIRP
Effective Isotropic Radiated Power
B
C
D
E
November 15, 2008
G24-L Module Hrdware Description
Acr & Abbr-1
Abbreviation
Full Name
E EMC
Electromagnetic Compatibility
E EOTD
Enhanced Observed Time Difference
E EPOS
Electronic Point of Sale
E ERP
Effective Radiated Power
E ESD
Electrostatic Discharge
E ETSI
European Telecommunication Standards Institute
F FCC
Federal Communications Commission (U.S.)
F FR
Full Rate
F FTA
Full Type Approval
G GCF
GSM Certification Forum
G GPIO
General Purpose Input/Output
G GPRS
General Packet Radio Service
G GSM
Global System for Mobile Communications
H HR
Half Rate
F
G
H
I
I
IC
Integrated Circuit
L
L LNA
Low-noise Amplifier
M MMCX
Miniature Micro Coax
M MO
Mobile Originated
M MT
Mobile Terminated
O OEM
Original Equipment Manufacturer
P PCB
Printed Circuit Board
P PCL
Power Class Level
P PCM
Pulse Code Modulation
P PCS
Personal Communication System (also known as GSM 1900)
P PD
Pull Down
P PDA
Personal Data Assistant
M
O
P
Acr & Abbr-2
G24-L Module Hrdware Description
November 15, 2008
Acronyms and Abbreviations
Abbreviation
Full Name
P PDU
Packet Data Unit
P PLL
Phase-locked Loop
P PTCRB
PCS-1900 Type Certification Review Board (GSM North America)
P PU
Pull Up
R R&TTE
Radio and Telecommunications Terminal Equipment
R RMS
Root Mean Square
R RI
Ring Indicator
R RTS
Request To Send
S SAR
Specific Absorption Rate
S SIM
Subscriber Identity Module
S SMS
Short Message Service
S SPI
Serial Peripheral Interface
T TDMA
Time Division Multiple Access
R
S
T
November 15, 2008
G24-L Module Hrdware Description
Acr & Abbr-3
Abbreviation
Full Name
U
U UART
Universal Asynchronous Receiver Transmitter
U USB
Universal Serial Bus
U USSD
Unstructured Supplementary Services Data
V VCC
Voltage Common Collector
V VSWR
Voltage Standing Wave Ratio
V
Acr & Abbr-4
G24-L Module Hrdware Description
November 15, 2008
Index
A
Antenna Installation, xi
Approvals
Regulatory, 5
B
Block Diagram Description, 7
E
Environmental
Specifications, 3
G
G24-L
Abbreviations, 2
Antenna Installation, xi
Block Diagram Description, 7
Product Specifications, 2
Regulatory Approvals, 5
Safety Precautions, xi
Standards, xii
Terms and Abbreviations, 2
Testing, 70
User Operation, xi
P
Physical Specifications, 2
Precautions, xi
Product Specifications, 3
R
Regulatory Approvals, 5
S
Safety Precautions, xi
Specifications, 2
Environmental, 3
Physical, 2
Standards, xii
Support Center, 67
T
Terms, 2
Testing, 70
Test Procedure, 72
Test Setup, 70
U
User Operation, xi
O
Organization of Manual, xxi
November 15, 2008
G24-L Module Hardware Description
Index-1
Index
Index-2
U-U
G24-L Module Hardware Description
November 15, 2008
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners.
©Copyright 2007 Motorola, Inc.
Java™Technology and/or J2ME™: Java and all other Java–based marks are trademarks or registered
trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
UNIX® : UNIX is a registered trademark of The Open Group in the United States and other countries.
@6802984C05@
6802984C05-D